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2.6.12-rc6-mm1

PATCH In review Andrew Morton 22 participants 71 messages Jun 7, 2005 – Aug 5, 2005

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ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.12-rc6/2.6.12-rc6-mm1/

- Added v9fs

- Various random fixes

- Probably a similar number of breakages

Changes since 2.6.12-rc5-mm2:

-fix-ide-scsi-eh-locking.patch -ext3-fix-log_do_checkpoint-assertion-failure.patch -ext3-fix-list-scanning-in-__cleanup_transaction.patch -namei-fixes-01-19.patch
-namei-fixes-02-19.patch
-namei-fixes-03-19.patch
-namei-fixes-04-19.patch
-namei-fixes-05-19.patch
-namei-fixes-06-19.patch
-namei-fixes-07-19.patch
-namei-fixes-08-19.patch
-namei-fixes-09-19.patch
-namei-fixes-10-19.patch
-namei-fixes-11-19.patch
-namei-fixes-12-19.patch
-namei-fixes-13-19.patch
-namei-fixes-14-19.patch
-namei-fixes-15-19.patch
-namei-fixes-16-19.patch
-namei-fixes-17-19.patch
-namei-fixes-18-19.patch
-namei-fixes-19-19.patch -ipmi-class_simple-fixes.patch -gregkh-i2c-i2c-ali1563.patch -git-ocfs-fix-for-shemminger-tcp-stuff.patch -gregkh-pci-pci-hotplug-shpchp-_HPP-fix.patch -gregkh-pci-pci-hotplug-shpchp-PERR-fix.patch -gregkh-pci-pci-amd74xx-ids.patch -gregkh-pci-pci-cpci-update.patch -gregkh-usb-usb-sl811-hcd-fixes.patch -gregkh-usb-usb-sl811_cs.patch -gregkh-usb-usb-ftdi_sio-new-id.patch -gregkh-usb-usb-serial-generic-init-fix.patch -gregkh-usb-usb-ub_multi_lun.patch -gregkh-usb-usb-remove_pwc_changelog.patch -gregkh-usb-usb-add-new-wacom-device-to-usb-hid-core-list.patch -gregkh-usb-usb-urb_documentation.patch -gregkh-usb-usb-earthmate-hid-blacklist.patch -gregkh-usb-usb-storage-trumpion.patch -gregkh-usb-usb-modalias-shrink.patch -gregkh-usb-usb-cp2101-flow-control.patch -gregkh-usb-usb-usbatm-reduce-log-spam.patch -gregkh-usb-usb-usbatm-avoid-oops-on-bind-failure.patch -gregkh-usb-usb-usbatm-1-fix.patch -usb-option-card-driver.patch -usb-wacom-tablet-driver.patch -atm-nicstar-remove-a-bunch-of-pointless-casts-of-null.patch -fix-atm-build-with-o=.patch -drivers-net-hamradio-baycom_eppc-cleanups.patch -ppc32-apple-device-tree-bug-fix.patch -ppc32-ppc64-cleanup-proc-device-tree.patch -ppc64-cleanup-spr-definitions.patch -ppc64-cleanup-iseries-runlight-support.patch -ppc64-remove-decr_overclock.patch -ppc64-fix-a-device-tree-bug-on-apples.patch -i386-collect-host-bridge-resources.patch -x86_64-collect-host-bridge-resources.patch -allow-ev_abs-to-work-in-uinputc.patch -serial-update-nec-vr4100-series-serial-support.patch

Merged

+ppc32-add-linux-compilerh-to-asm-sigcontexth.patch +include-linux-configh-before-testing-config_acpi.patch +uml-make-the-emulated-iomem-driver-work-on-26.patch +uml-compile-fixes-for-gcc-4.patch +uml-fix-strace-f.patch +uml-clean-up-error-path.patch +uml-link-tt-mode-against-nptl.patch +send_ipi_mask_sequence-warning-fix.patch +ppc32-add-405ep-cpu_spec-entry.patch +input-disable-scroll-feature-on-at-keyboards.patch

Planned for 2.6.12

+x86_64-task_size-fixes-for-compatibility-mode-processes.patch

x86_64 critical fixes (needs work)

+ia64-disable-preempt.patch

Disable CONFIG_PREEMPT on ia64 (it has problem with floating-point save/restore)

+fix-up-macro-abuse-in-drivers-acpi-sleep-procc.patch

ACPI cleanup

+git-arm.patch
+git-arm-smp.patch

ARM git trees

-git-cpufreq.patch

Empty

+fix-warning-in-powernow-k8c.patch

Fix a cpufreq warning

+gregkh-driver-ipmi-class_simple-fixes.patch +gregkh-driver-sysfs-permissions-01.patch +gregkh-driver-sysfs-permissions-02.patch +gregkh-driver-sysfs-permissions-03.patch +gregkh-driver-dont-loose-devices-on-suspend-failure.patch

New driver core patches

-bk-drm.patch
-bk-drm-via.patch

DRM is moving to git

-update-drm-ioctl-compatibility-to-new-world-order.patch

The code which this pathces isn't there any more (it will come back)

+git-drm-initmap.patch
+git-drm-via.patch

Some DRM git trees

+gregkh-i2c-i2c-Kconfig-update.patch
+gregkh-i2c-i2c-pcf8574-cleanup.patch
+gregkh-i2c-i2c-adm9240-docs.patch
+gregkh-i2c-i2c-device-attr-lm90.patch
+gregkh-i2c-i2c-device-attr-lm83.patch
+gregkh-i2c-i2c-device-attr-lm63.patch
+gregkh-i2c-i2c-device-attr-it87.patch
+gregkh-i2c-hwmon-01.patch
+gregkh-i2c-hwmon-02.patch
+gregkh-i2c-hwmon-03.patch

i2c tree updates

+i2c-chips-need-hwmon.patch
+gregkh-i2c-hwmon-02-sparc64-fix.patch

Fix a few things in the i2c tree

+sonypi-make-sure-that-input_work-is-not-running-when-unloading.patch

sonypi fix

-git-libata-adma.patch
-git-libata-ahci-msi.patch
-git-libata-bridge-detect.patch
-git-libata-chs-support.patch
-git-libata-docs.patch
-git-libata-svw.patch
-git-libata-promise-sata-pata.patch
-git-libata-pdc2027x.patch

Dropped the libata tree - it changes all the time and I can't wqork out wtf is going on.

-git-netdev-r8169.patch

Too many rejects from this one.

+fix-recursive-ipw2200-dependencies.patch +drivers-net-chelsio-cxgb2-use-the-dma_3264bit_mask-constants.patch +drivers-net-wireless-ipw2100-use-the-dma_32bit_mask-constant.patch +drivers-net-wireless-ipw2200-use-the-dma_32bit_mask-constant.patch +fix-tulip-suspend-resume.patch

Net driver fixes

+scalable-tcp-cleaned.patch

"scalable TCP"

+git-serial.patch

Serial subsystem tree

+gregkh-pci-pci-fix-routing-in-parent-bridge.patch +gregkh-pci-pci-dma-bursting-advice.patch +gregkh-pci-pci-collect-host-bridge-resources-01.patch +gregkh-pci-pci-collect-host-bridge-resources-02.patch

PCI subsystem tree updates

+gregkh-pci-pci-dma-bursting-advice-fix.patch

Fix it

-git-scsi-rc-fixes.patch

This is empty

+gregkh-usb-usb-usbatm-reduce-log-spam.patch +gregkh-usb-usb-usbatm-avoid-oops-on-bind-failure.patch +gregkh-usb-usb-usbatm-fix-gcc-2.95.x.patch +gregkh-usb-usb-usbatm-kcalloc.patch +gregkh-usb-usb-uhci-detect-invalid-ports.patch +gregkh-usb-usb-export-getput_intf.patch +gregkh-usb-usb-cdc-acm-reference-count-fix.patch +gregkh-usb-usb-ehci-fix-page-pointer-allocate.patch +gregkh-usb-usb-wireless-definitions.patch +gregkh-usb-usb-usblp-race-fix.patch +gregkh-usb-usb-stv680-creative-mini.patch +gregkh-usb-usb-atiremote-sysfs-links.patch +gregkh-usb-usb-gotemp.patch

USB tree updates

+sparsemem-memory-model-fix-4.patch
+sparsemem-memory-model-fix-5.patch

Fix sparsemem-memory-model.patch even more

+sparsemem-hotplug-base-fix.patch

Fix sparsemem-hotplug-base.patch

-vm-merge_lru_pages.patch
-vm-page-cache-reclaim-core.patch
-vm-page-cache-reclaim-core-tidy.patch
-vm-reclaim_page_cache_node-syscall.patch
-vm-reclaim_page_cache_node-syscall-x86.patch
-vm-automatic-reclaim-through-mempolicy.patch
+vm-add-may_swap-flag-to-scan_control.patch
+vm-early-zone-reclaim.patch
+vm-early-zone-reclaim-tidy.patch
+vm-add-__gfp_noreclaim.patch
+vm-rate-limit-early-reclaim.patch

These patches were updated

+node-local-per-cpu-pages-tidy-2-fix.patch

Fix node-local-per-cpu-pages.patch some more.

+avoiding-mmap-fragmentation-revert-unneeded-64-bit-changes-vs-x86_64-task_size-fixes-for-compatibility-mode-processes.patch

Fix a patch clash

+__mod_page_state-pass-unsigned-long-instead-of-unsigned.patch +__read_page_state-pass-unsigned-long-instead-of-unsigned.patch

Warning fixes

+add-oom-debug.patch

Additional debug output when the box goes oom.

+periodically-drain-non-local-pagesets.patch
+periodically-drain-non-local-pagesets-fix.patch

Shrink the per-cpu-pages caches occasionally

+ia64-uncached-alloc.patch
+sn2-xpc-build-patches.patch

Special allocator for uncached pages

+shmem-restore-superblock-info.patch
+mbind-fix-verify_pages-pte_page.patch
+mbind-check_range-use-standard-ptwalk.patch
+dup_mmap-update-comment-on-new-vma.patch
+bad_page-clear-reclaim-and-slab.patch
+rme96xx-fix-pagereserved-range.patch
+get_user_pages-kill-get_page_map.patch
+do_wp_page-cannot-share-file-page.patch
+can_share_swap_page-use-page_mapcount.patch
+msync-check-pte-dirty-earlier.patch

Various mm fixes

+sunzilog-warning-fixes.patch
+ppp-handle-misaligned-accesses.patch

Net fixes

+ppc32-removed-dependency-on-config_cpm2-for-building.patch +ppc32-converted-mpc10x-bridge-to-use-platform.patch +cpm_uart-route-scc2-pins-for-the-stx-gp3-board.patch

ppc32 updates

+ppc64-iseries-remove-iseries_proch.patch +ppc64-iseries-header-file-white-space-cleanups.patch +ppc64-iseries-more-header-file-white-space-cleanups.patch +ppc64-iseries-obvious-code-simplifications.patch +ppc64-iseries-remove-lpardatah.patch +ppc64-iseries-eliminate-some-unused-inline-functions.patch +ppc64-iseries-remove-hvcallcfgh.patch +ppc64-iseries-cleanup-itlpqueueh.patch +ppc64-iseries-tidy-up-some-includes-and-hvcallh.patch +ppc64-iseries-misc-header-cleanups.patch +update-ppc64-defconfig.patch +ppc64-iseries-remove-iseries_pci_resetc.patch +ppc64-iseries-iommuh-cleanups.patch +ppc64-iseries-iseries_vpdinfoc-cleanups.patch +ppc64-iseries-iseries_pcih-cleanups.patch +ppc64-iseries-remove-ioretry-from-iseries_device_node.patch +ppc64-iseries-remove-some-more-members-of.patch

ppc64 updates

+x86-x86_64-pcibus_to_node-fix.patch

Fix x86-x86_64-pcibus_to_node.patch

+mempool-bounce-buffer-restriction.patch

Limit the amount of memory which can be used for bounce buffers

+arm-irqs_disabled-type-fix.patch

ARM warning fix

+variable-overflow-after-hundreds-round-of-hotplug-cpu.patch

CPU hotplug fix

+x86_64-change-init-sections-for-cpu-hotplug-support.patch +x86_64-change-init-sections-for-cpu-hotplug-support-fix.patch +x86_64-cpu-hotplug-support.patch +x86_64-cpu-hotplug-sibling-map-cleanup.patch +x86_64-dont-use-broadcast-shortcut-to-make-it-cpu-hotplug-safe.patch +x86_64-provide-ability-to-choose-using-shortcuts-for-ipi-in-flat-mode.patch

CPU hotplug for x86_64

+m32r-support-m3a-2170mappi-iii-platform-fix.patch +m32r-support-m3a-2170mappi-iii-platform-fix-2.patch +m32r-update-setup_xxxxxc.patch +m32r-update-m32r_cfc-to-support-mappi-iii-fix.patch +m32r-cleanup-arch-m32r-mm-extablec.patch +m32r-remove-include-asm-m32r-m32102perih.patch +m32r-update-defconfig-files.patch +m32r-use-asm-generic-div64h.patch

m32r fixes and updates

+s390-cio-max-channels-checks.patch +s390-cio-documentation.patch +s390-ifdefs-in-compat_ioctls.patch +s390-kernel-stack-overflow-panic.patch +s390-cmm-sender-parameter-visibility.patch +s390-memory-detection-32gb.patch +s390-pending-interrupt-after-ipl-from-reader.patch

s/390 updates

+ecryptfs-export-user-key-type.patch

Export a symbol

+x86_64-specific-function-return-probes.patch +kprobes-ia64-cleanup-2.patch +kprobes-ia64-cmp-ctype-unc-support.patch +kprobes-ia64-safe-register-kprobe.patch +kprobes-temporary-disarming-of-reentrant-probe-for-x86_64-fix.patch +allow-a-jprobe-to-coexist-with-muliple-kprobes.patch

kprobes updates

+cs4236-irq-handling-fix.patch

OSS driver fix

+block-add-unlocked_ioctl-support-for-block-devices.patch

Support lock_kernel-less ioctls on blockdevs

+pcdp-handle-tables-that-dont-supply-baud-rate.patch

serial driver update

+stop-arch-i386-kernel-vsyscall-noteo-being-rebuilt-every-time.patch

kbuild fix

+remove-f_error-field-from-struct-file.patch

cleanup

+autofs4-avoid-panic-on-bind-mount-of-autofs-owned-directory.patch +autofs4-post-expire-race-fix.patch +autofs4-bad-lookup-fix.patch +autofs4-subversion-bump-to-identify-these-changes.patch

autofs4 updates

+rapidio-support-core-base.patch
+rapidio-support-core-includes.patch
+rapidio-support-core-enum.patch
+rapidio-support-ppc32.patch
+rapidio-support-net-driver.patch

RapidIO driver

+dlm-lockspaces-callbacks-directory-dlm-consistent-ifdefs.patch +dlm-lockspaces-callbacks-directory-fix-2-dlm-dont-repeat-include.patch +dlm-lockspaces-callbacks-directory-fix-3.patch +dlm-lockspaces-callbacks-directory-dlm-dont-free-lvb-twice.patch +dlm-communication-dlm-dont-add-duplicate-node-addresses.patch +dlm-recovery-dlm-timer-cant-be-global.patch +dlm-recovery-dlm-clear-recovery-flags.patch +dlm-device-interface-dlm-uncomment-unregister_lockspace.patch +dlm-device-interface-dlm-newline-in-printks.patch +dlm-debug-fs-dlm-consistent-ifdefs.patch

Various fixes and updates to the DLM driver

+tuner-corec-improvments-and-ymec-tvision-tvf8533mf.patch

v4l udpate

+oprofile-report-anonymous-region-samples.patch

oprofile feature

+lockd-flush-signals-on-shutdown.patch +nfs4-hold-filp-while-reading-or-writing.patch +nfsd4-fix-probe_callback.patch +nfsd4-nfs4_check_open_reclaim-cleanup.patch +nfsd4-create-separate-laundromat-workqueue.patch +nfsd4-simplify-lease-changing.patch +nfsd4-delegation-recovery.patch +nfsd4-rename-nfs4_state_init.patch +nfsd4-clean-up-state-initialization.patch +nfsd4-remove-nfs4_reclaim_init.patch +nfsd4-idmap-initialization.patch +nfsd4-setclientid-simplification.patch +nfsd4-reboot-hash.patch +nfsd4-add-find_unconf_by_str-functions-to-simplify-setclientid.patch +nfsd4-grace-period-end.patch +nfsd4-make-needlessly-global-code-static.patch +nfsd4-fix-uncomfirmed-list.patch +nfsd4-fix-setclientid_confirm-cases.patch +nfsd4-fix-setclientid_confirm-error-return.patch +nfsd4-setclientid_confirm-gotoectomy.patch +nfsd4-setclientid_confirm-comments.patch +nfsd4-miscellaneous-setclientid_confirm-cleanup.patch +nfsd4-rename-state-list-fields.patch +nfsd4-allow-multiple-lockowners.patch +nfsd4-remove-cb_parsed.patch +nfsd4-initialize-recovery-directory.patch +nfsd4-reboot-recovery.patch
+nfsd4-reboot-dirname.patch

nfsd updates

+isofs-show-hidden-files-add-granularity-for-assoc-hidden-files-flags.patch +isofs-show-hidden-files-add-granularity-for-assoc-hidden-files-flags-tidy.patch +isofs-show-hidden-files-add-granularity-for-assoc-hidden-files-flags-fix.patch

isofs feature work

+numa-aware-slab-allocator-v5.patch

The NUMA-aware slab allocator is back. Needs ifdef-reduction work.

-periodically-scan-redzone-entries-and-slab-control-structures.patch -slab-leak-detector.patch -slab-leak-detector-warning-fixes.patch

It broke these.

+numa-aware-slab-allocator-v3-__bad_size-fix.patch

Fix it.

+sched-run-sched_normal-tasks-with-real-time-tasks-on-smt-siblings.patch

CPU scheduler fix

+v4l-add-support-for-pixelview-ultra-pro.patch
+dvico-fusionhdtv3-gold-t-documentation-fix.patch

v4l updates

+kexec-code-cleanup.patch

Make all the kexec patches resemble CodingStyle.

+v9fs-documentation-makefiles-configuration.patch +v9fs-documentation-makefiles-configuration-fix.patch +v9fs-vfs-file-dentry-and-directory-operations.patch +v9fs-vfs-file-dentry-and-directory-operations-fix.patch +v9fs-vfs-inode-operations.patch +v9fs-vfs-superblock-operations-and-glue.patch +v9fs-9p-protocol-implementation.patch +v9fs-transport-modules.patch +v9fs-debug-and-support-routines.patch +v9fs-debug-and-support-routines-fix.patch

The plan9 networked filesystem

+framebuffer-driver-for-arc-lcd-board.patch +framebuffer-driver-for-arc-lcd-board-tidy.patch +framebuffer-driver-for-arc-lcd-board-update.patch +new-pci-id-for-chipsfb.patch

fbdev updates

+modules-add-version-and-srcversion-to-sysfs-fix.patch +modules-add-version-and-srcversion-to-sysfs-fix-2.patch

Fix modules-add-version-and-srcversion-to-sysfs.patch

+fuse-device-functions-fuse-serious-information-leak-fix.patch

FUSE fix

+remove-redundant-info-from-submittingpatches.patch

Documentation update

-unexport-slab_reclaim_pages.patch

Drop this due to some reject.

number of patches in -mm: 1397
number of changesets in external trees: 53
number of patches in -mm only: 1395
total patches: 1448

All 1397 patches:

ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.12-rc6/2.6.12-rc6-mm1/patch-list

#1 lore raw
Quoted 1 line · Andrew Morton

+avoiding-mmap-fragmentation-revert-unneeded-64-bit-changes-vs-x86_64-task_size-fixes-for-compatibility-mode-processes.patch

As a heads-up.

This one breaks the fragmentation reduction patch in 32 bit emulation mode. Our test case shows the standard 17 fragmented regions in /proc/self/maps (as in the 2.6 standard kernel) vs the 2 regions in 2.6.12-rc5-mm2 (and before).

Somehow the new way of detecting 32 bit remulation mode seems to fail here.

I'll try to figure out a fix.

Wolfgang

#2 lore raw
Quoted 8 lines · Wolfgang Wander
Quoted 2 lines · Andrew Morton

+avoiding-mmap-fragmentation-revert-unneeded-64-bit-changes-vs-x86_64-task_size-fixes-for-compatibility-mode-processes.patch

As a heads-up.

Quoted 8 lines

This one breaks the fragmentation reduction patch in 32 bit emulation mode. Our test case shows the standard 17 fragmented regions in /proc/self/maps (as in the 2.6 standard kernel) vs the 2 regions in 2.6.12-rc5-mm2 (and before).

Somehow the new way of detecting 32 bit remulation mode seems to fail here.

I'll try to figure out a fix.

Here is one possibility:

Since rc6 the difference between TASK_UNMAPPED_64 and TASK_UNMAPPED_32 is gone and both are now merged into TASK_UNMAPPED_BASE. Therefore we can no longer check our local base against TASK_UNMAPPED_BASE to see if we are running in 32bit emulation mode. The appended patch uses other (hopefully the right) means.

Tested on x86_64 in 32 and 64 mode (64 bit fragments as desired, 32 bit collapses as desired).

x86_64/kernel/sys_x86_64.c renamed from x86_64/kernel/sys_x86_64.c~ +2 -1
@@ -105,7 +105,8 @@ arch_get_unmapped_area(struct file *filp
 		    (!vma || addr + len <= vma->vm_start))
 			return addr;
 	}
-	if (begin != TASK_UNMAPPED_BASE && len <= mm->cached_hole_size) {
+	if (((flags & MAP_32BIT) || test_thread_flag(TIF_IA32))
+	    && len <= mm->cached_hole_size) {
 	        mm->cached_hole_size = 0;
 		mm->free_area_cache = begin;
 	}
#3 lore raw
In reply to Andrew Morton
Quoted 7 lines · Andrew Morton

ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.12-rc6/2.6.12-rc6-mm1/

- Added v9fs

- Various random fixes

- Probably a similar number of breakages

Hi Andrew,

I didn't see any breakage. But I get these two lines during boot:
yenta 0000:02:03.1: no resource of type 100 available, trying to continue... yenta 0000:02:03.1: no resource of type 100 available, trying to continue...

Anyway, my PCMCIA slots seem to still work.

Brice

#4 lore raw

2.6.12-rc6-mm1: rio confusion

In reply to Andrew Morton

Review

Quoted 11 lines · Andrew Morton

...
Changes since 2.6.12-rc5-mm2:
...

(quoted diff) +5 -0
+rapidio-support-core-base.patch
+rapidio-support-core-includes.patch
+rapidio-support-core-enum.patch
+rapidio-support-ppc32.patch
+rapidio-support-net-driver.patch
 
 RapidIO driver
...

That we do now have both drivers/rio/ and drivers/char/rio/ and that they are for completely different things is confusing.

What about drivers/rapidio/ ?

cu
Adrian

Signature · 4 lines
       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed
#5 lore raw

Re: 2.6.12-rc6-mm1: rio confusion

Quoted 10 lines · Adrian Bunk
Quoted 9 lines · Andrew Morton

...
Changes since 2.6.12-rc5-mm2:
...

(quoted diff) +5 -0
+rapidio-support-core-base.patch
+rapidio-support-core-includes.patch
+rapidio-support-core-enum.patch
+rapidio-support-ppc32.patch
+rapidio-support-net-driver.patch
Quoted 7 lines
Quoted 2 lines

RapidIO driver
...

That we do now have both drivers/rio/ and drivers/char/rio/ and that they are for completely different things is confusing.

What about drivers/rapidio/ ?

Fine with me. I'll roll it into my next update.

-Matt

#6 lore raw
In reply to Andrew Morton

Andrew Morton <[email protected]> :
[...]

Quoted 3 lines

-git-netdev-r8169.patch

Too many rejects from this one.

How did you generate git-netdev-r8169.patch ?

Jeff's 'upstream-2.6.13' includes all the pending r8169 changes and nothing will be merged before 2.6.12 is out. Imho you can safely ignore any r8169 change until 2.6.12 appears.

--
Ueimor

#7 lore raw
In reply to Andrew Morton
Quoted 2 lines · Andrew Morton

ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.12-rc6/2. 6.12-rc6-mm1/

[snip]

Quoted 7 lines
(quoted diff) +7 -0
+gregkh-i2c-i2c-Kconfig-update.patch
+gregkh-i2c-i2c-pcf8574-cleanup.patch
+gregkh-i2c-i2c-adm9240-docs.patch
+gregkh-i2c-i2c-device-attr-lm90.patch
+gregkh-i2c-i2c-device-attr-lm83.patch
+gregkh-i2c-i2c-device-attr-lm63.patch
+gregkh-i2c-i2c-device-attr-it87.patch

Review

Quoted 10 lines
(quoted diff) +5 -0
+gregkh-i2c-hwmon-01.patch
+gregkh-i2c-hwmon-02.patch
+gregkh-i2c-hwmon-03.patch
 
 i2c tree updates
 
+i2c-chips-need-hwmon.patch
+gregkh-i2c-hwmon-02-sparc64-fix.patch
 
 Fix a few things in the i2c tree

[snip]

after those changes i don't get entries in /sys for my W83627THF chip. (p4c800-D, i875,ICH5)

relevant config parts:

CONFIG_HWMON=y
CONFIG_I2C=y
CONFIG_I2C_ISA=y
CONFIG_I2C_SENSOR=y
CONFIG_SENSORS_W83627HF=y

thanks.

-SL

#8 lore raw

Hi Soren,

Quoted 26 lines

[snip]

Quoted 7 lines
(quoted diff) +7 -0
+gregkh-i2c-i2c-Kconfig-update.patch
+gregkh-i2c-i2c-pcf8574-cleanup.patch
+gregkh-i2c-i2c-adm9240-docs.patch
+gregkh-i2c-i2c-device-attr-lm90.patch
+gregkh-i2c-i2c-device-attr-lm83.patch
+gregkh-i2c-i2c-device-attr-lm63.patch
+gregkh-i2c-i2c-device-attr-it87.patch

Review

Quoted 10 lines
(quoted diff) +5 -0
+gregkh-i2c-hwmon-01.patch
+gregkh-i2c-hwmon-02.patch
+gregkh-i2c-hwmon-03.patch
 
 i2c tree updates
 
+i2c-chips-need-hwmon.patch
+gregkh-i2c-hwmon-02-sparc64-fix.patch
 
 Fix a few things in the i2c tree

[snip]

after those changes i don't get entries in /sys for my W83627THF chip.

(p4c800-D, i875,ICH5)

Quoted 7 lines

relevant config parts:

CONFIG_HWMON=y
CONFIG_I2C=y
CONFIG_I2C_ISA=y
CONFIG_I2C_SENSOR=y
CONFIG_SENSORS_W83627HF=y

Which kernel are you upgrading from?

Is CONFIG_PNPACPI set? If it is, try whithout it.

If it doesn't work, please try reverting (in reverse order):
gregkh-i2c-hwmon-01.patch gregkh-i2c-hwmon-02.patch gregkh-i2c-hwmon-03.patch i2c-chips-need-hwmon.patch gregkh-i2c-hwmon-02-sparc64-fix.patch
and see how it goes.

Thanks,

Signature · 1 line
Jean Delvare
#9 lore raw
Quoted 1 line · Jean Delvare

Hi Soren,

Hi,

Quoted 1 line

Which kernel are you upgrading from?

from 2.6.12-rc5-mm2

Quoted 1 line

Is CONFIG_PNPACPI set? If it is, try whithout it.

nope, don't even have CONFIG_PNP set.

Quoted 7 lines

If it doesn't work, please try reverting (in reverse order):
gregkh-i2c-hwmon-01.patch gregkh-i2c-hwmon-02.patch gregkh-i2c-hwmon-03.patch i2c-chips-need-hwmon.patch gregkh-i2c-hwmon-02-sparc64-fix.patch
and see how it goes.

yeap, reverting these did the trick, all i2c entries in sysfs are back. :)

Quoted 1 line

Thanks,

thanks alot.
cheers.

-SL

#10 lore raw

Hi Soren, et. al.:

Quoted 8 lines · Jean Delvare
Quoted 7 lines

If it doesn't work, please try reverting (in reverse order):
gregkh-i2c-hwmon-01.patch gregkh-i2c-hwmon-02.patch gregkh-i2c-hwmon-03.patch i2c-chips-need-hwmon.patch gregkh-i2c-hwmon-02-sparc64-fix.patch
and see how it goes.

Quoted 1 line · Søren Lott

yeap, reverting these did the trick, all i2c entries in sysfs are back. :)

My bad. Although I will redo the hwmon patches soon anyway, here is a patch that you can apply (after reapplying the above) that should get you working again. BTW: I tested it on almost identical h/w as yours, this time with the same relevant config options, against 2.6.12-rc5-mm1. This applies to -rc6-mm1.

---------------

This patch fixes an init order bug between hwmon and i2c/chips, without which many sensors drivers will not initialize properly (in non-modular systems).

drivers/Makefile +4 -1
Index: linux-2.6.12-rc6-mm1/drivers/Makefile
===================================================================
@@ -53,8 +53,11 @@ obj-$(CONFIG_USB_GADGET)	+= usb/gadget/
 obj-$(CONFIG_GAMEPORT)		+= input/gameport/
 obj-$(CONFIG_INPUT)		+= input/
 obj-$(CONFIG_I2O)		+= message/
-obj-$(CONFIG_I2C)		+= i2c/
+
+# most of i2c/chips depends on hwmon/
 obj-$(CONFIG_HWMON)		+= hwmon/
+obj-$(CONFIG_I2C)		+= i2c/
+
 obj-$(CONFIG_W1)		+= w1/
 obj-$(CONFIG_PHONE)		+= telephony/
 obj-$(CONFIG_MD)		+= md/
Signature · 2 lines
Mark M. Hoffman
[email protected]
#11 lore raw
In reply to Andrew Morton

We've been seeing an early boot hang on IBM x-series (at least on an x440) with -rc6-mm1. Finally got hold of a box to go search for this and it seems that backing out the three patches below fixes it.

 515  dmi-move-acpi-boot-quirk.patch
 516  dmi-move-acpi-sleep-quirk.patch
 517  dmi-remove-central-blacklist.patch

I am pretty sure it is actually the first one (thats where my bisection search pointed) but I had to drop the other two to back it out. Anyhow, 2.6.12-rc6-mm1 boots on an x440 with these backed out.

Cheers.

-apw

#12 lore raw
Quoted 8 lines · Andy Whitcroft

We've been seeing an early boot hang on IBM x-series (at least on an
x440) with -rc6-mm1. Finally got hold of a box to go search for this and it seems that backing out the three patches below fixes it.

  515  dmi-move-acpi-boot-quirk.patch
  516  dmi-move-acpi-sleep-quirk.patch
  517  dmi-remove-central-blacklist.patch

Thanks for taking the time to do that - it helps enormously.

The patches aren't terribly important - I'll drop them if nobody sees the problem. It might be an incorrect __init/__initdata/etc marking. But that wouldn't cause an "early" boot hang...

#13 lore raw
Quoted 10 lines · --On Wednesday, June 08, 2005 13:01:17 -0700 Andrew Morton <[email protected]>…
Quoted 8 lines · Andy Whitcroft

We've been seeing an early boot hang on IBM x-series (at least on an
x440) with -rc6-mm1. Finally got hold of a box to go search for this and it seems that backing out the three patches below fixes it.

  515  dmi-move-acpi-boot-quirk.patch
  516  dmi-move-acpi-sleep-quirk.patch
  517  dmi-remove-central-blacklist.patch
Quoted 5 lines

Thanks for taking the time to do that - it helps enormously.

The patches aren't terribly important - I'll drop them if nobody sees the problem. It might be an incorrect __init/__initdata/etc marking. But that wouldn't cause an "early" boot hang...

That does indeed make it boot. However ... once it's booted it seems to hit another problem, a hang condition ;-( I suspect it's unrelated. The box is still up and responsive, but cp spins.

I'm still chasing the other boot/hang double problem (amd64), so can't really look at this right now, but if anyone has any bright ideas they want me to try, or wants more info, let me know (machine is still hung in that state).

Some snippets:

ps -ef:

root 10980 10979 0 09:02 ? 00:00:00 /bin/bash /usr/local/autobench/scripts/run test kernbench 32 5 -
m 2^M
root 11060 10980 0 09:02 ? 00:00:00 /bin/bash /usr/local/autobench/scripts/getsysinfo before /usr/lo
cal/autobench/logs/k^M
root 11219 11060 0 09:02 ? 00:00:00 /bin/bash /usr/local/autobench/scripts/archive_dir /proc/scsi /u
sr/local/autobench/l^M
root 11221 11219 99 09:02 ? 04:13:26 cp -r /proc/scsi/aic7xxx /proc/scsi/device_info /proc/scsi/scsi
/usr/local/autobench^M

alt+sysrq+t

^M^@getsysinfo S CB5260CC 0 11060 10980 11219 (NOTLB)
^M^@d5fc1f40 00000082 fffffe00 cb5260cc 00000000 c011259b 2691b900 003d08e4
^M^@ 080fa558 00000001 d5fc1f38 c04715c0 c0473080 bfcb43b8 d740e000 cb526020
^M^@ 00000001 cb526020 00000007 d5fc1fbc 0008b824 26cec200 003d08e4 c02fc928
^M^@Call Trace:
^M^@ [<c011259b>] do_page_fault+0x193/0x60f
^M^@ [<c011d584>] do_wait+0x2a4/0x358
^M^@ [<c0115ff8>] default_wake_function+0x0/0x1c
^M^@ [<c0115ff8>] default_wake_function+0x0/0x1c
^M^@ [<c011d6c6>] sys_wait4+0x26/0x38
^M^@ [<c011d6ee>] sys_waitpid+0x16/0x1a
^M^@ [<c0102a19>] syscall_call+0x7/0xb
^M^@archive_dir S CBB810CC 0 11219 11060 11221 (NOTLB)
^M^@d7793f40 00000082 fffffe00 cbb810cc 00000000 c011259b 28b70a00 003d08e4
^M^@ 080fa158 00000001 d7793f38 c04715c0 c0473080 bfc51a68 c040e000 cbb81020
^M^@ 00000001 cbb81020 00000007 d7793fbc 00000000 28b70a00 003d08e4 c02fc928
^M^@Call Trace:
^M^@ [<c011259b>] do_page_fault+0x193/0x60f
^M^@ [<c011d584>] do_wait+0x2a4/0x358
^M^@ [<c0115ff8>] default_wake_function+0x0/0x1c
^M^@ [<c0115ff8>] default_wake_function+0x0/0x1c
^M^@ [<c011d6c6>] sys_wait4+0x26/0x38
^M^@ [<c011d6ee>] sys_waitpid+0x16/0x1a
^M^@ [<c0102a19>] syscall_call+0x7/0xb
^M^@cp R running 0 11221 11219 (NOTLB)
^M^@sleep S D77A1F68 0 11906 1409 (NOTLB)
^M^@d77a1f58 00000086 0039a67c d77a1f68 bfade9d8 272d8698 b605a700 003d16b7
^M^@ d5c1e804 d6ecdbac d77a1f50 c04715c0 c0473080 d77a1fbc d6ecd814 d76d3020
^M^@ 00000282 c0121f31 0039a67c c107d0e0 00000000 b605a700 003d16b7 d77a1f68
^M^@Call Trace:
^M^@ [<c0121f31>] lock_timer_base+0x19/0x3c
^M^@ [<c02ef4db>] schedule_timeout+0x7b/0x9c
^M^@ [<c0122904>] process_timeout+0x0/0xc
^M^@ [<c01229fb>] sys_nanosleep+0xdb/0x158
^M^@ [<c0102a19>] syscall_call+0x7/0xb
^M^@BUG: soft lockup detected on CPU#0!
^M
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c02efcd9>] CPU: 0
^M^@EIP is at _spin_unlock_irqrestore+0x5/0x8
^M^@ EFLAGS: 00000292 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: c03b9b84 EBX: c03b9ad4 ECX: 0a000000 EDX: 00000292 ^M^@ESI: 00000074 EDI: c040ffa4 EBP: d5c16000 DS: 007b ES: 007b ^M^@CR0: 8005003b CR2: 080f9008 CR3: 16dd0300 CR4: 000006b0 ^M^@ [<c020e729>] __handle_sysrq+0x121/0x128
^M^@ [<c020e74f>] handle_sysrq+0x1f/0x24
^M^@ [<c021dda4>] receive_chars+0x16c/0x270
^M^@ [<c021e0a2>] serial8250_interrupt+0x66/0xe4
^M^@ [<c01320f0>] handle_IRQ_event+0x28/0x58
^M^@ [<c0132203>] __do_IRQ+0xe3/0x134
^M^@ [<c0104b4b>] do_IRQ+0x1b/0x28
^M^@ [<c01033d6>] common_interrupt+0x1a/0x20
^M^@ [<c0100bb0>] default_idle+0x0/0x2c
^M^@ [<c0100bd3>] default_idle+0x23/0x2c
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c01002c8>] rest_init+0x28/0x2c
^M^@ [<c0410899>] start_kernel+0x19d/0x1a0

alt+sysrq+p does wierd stuff (is that new patch in your tree Andrew? doesn't seem to inter-react with the other NMI code well)

Command> break
^@SysRq : Show Regs
^M
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 0
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: c040e000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: b7e3f5a0 CR3: 16dd0300 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c01002c8>] rest_init+0x28/0x2c
^M^@ [<c0410899>] start_kernel+0x19d/0x1a0
^M^@ Uhhuh. NMI received for unknown reason 00 on CPU 1.
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 16.
^M^@Dazed and confused, but trying to continue
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 3.
^M^@Do you have a strange power saving mode enabled?
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 17.
^M^@----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 16
^M^@EIP is at default_idle+0x23/0x2c
^M^@Dazed and confused, but trying to continue
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 2.
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 18.
^M^@Dazed and confused, but trying to continue
^M^@Do you have a strange power saving mode enabled?
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@Do you have a strange power saving mode enabled?
^M^@Dazed and confused, but trying to continue
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 19.
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d7420000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@Do you have a strange power saving mode enabled?
^M^@Dazed and confused, but trying to continue
^M^@Do you have a strange power saving mode enabled?
^M^@CR0: 8005003b CR2: 00000000 CR3: 17771800 CR4: 000006b0
^M^@Dazed and confused, but trying to continue
^M^@Do you have a strange power saving mode enabled?
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>]Uhhuh. NMI received for unknown reason 00 on CPU 6.
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 20.
^M^@ start_secondary+0x13d/0x140
^M^@Dazed and confused, but trying to continue
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 18
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 10.
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d7426000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: b7f25d9c CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>]Uhhuh. NMI received for unknown reason 00 on CPU 29.
^M^@ cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 2
^M^@ EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d7400000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: b7edeb00 CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>]Uhhuh. NMI received for unknown reason 00 on CPU 23.
^M^@ start_secondary+0x13d/0x140
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 7.
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 3
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d7402000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@Do you have a strange power saving mode enabled?
^M^@CR0: 8005003b CR2: b7f95438 CR3: 17771800 CR4: 000006b0
^M^@ [<c0100ca3>]Uhhuh. NMI received for unknown reason 00 on CPU 4.
^M^@ cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 17
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 5.
^M^@Dazed and confused, but trying to continue
^M^@EIP is at default_idle+0x23/0x2c
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 14.
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d7424000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: 00000000 CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>]Uhhuh. NMI received for unknown reason 00 on CPU 9.
^M^@ cpu_idle+0x7b/0x8c
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 25.
^M^@ [<c010e79d>] start_secondary+0x13d/0x140Dazed and confused, but trying to continue ^M
^M^@----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 19
^M^@ EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d7428000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: b7f30d9c CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>]Uhhuh. NMI received for unknown reason 00 on CPU 13.
^M^@ start_secondary+0x13d/0x140
^M^@ Do you have a strange power saving mode enabled?
^M^@----------- IPI show regs -----------Uhhuh. NMI received for unknown reason 00 on CPU 8. ^M^@Uhhuh. NMI received for unknown reason 00 on CPU 11.
^M^@Dazed and confused, but trying to continue
^M^@Dazed and confused, but trying to continue
^M^@Dazed and confused, but trying to continue
^M
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 20
^M^@Dazed and confused, but trying to continue
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 22.
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 26.
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@Dazed and confused, but trying to continue
^M^@Do you have a strange power saving mode enabled?
^M^@Dazed and confused, but trying to continue
^M^@Do you have a strange power saving mode enabled?
^M^@ESI: d742a000 EDI: c0470300 EBP: c0470300Uhhuh. NMI received for unknown reason 00 on CPU 30. ^M^@Dazed and confused, but trying to continue
^M^@Do you have a strange power saving mode enabled?
^M^@Do you have a strange power saving mode enabled?
^M^@Do you have a strange power saving mode enabled?
^M^@ DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: 00000000 CR3: 00474000 CR4: 000006b0
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 21.
^M^@ [<c0100ca3>]Dazed and confused, but trying to continue
^M^@Do you have a strange power saving mode enabled?
^M^@Dazed and confused, but trying to continue
^M^@Do you have a strange power saving mode enabled?
^M^@ cpu_idle+0x7b/0x8c
^M^@Dazed and confused, but trying to continue
^M^@ [<c010e79d>]Do you have a strange power saving mode enabled?
^M^@ start_secondary+0x13d/0x140
^M^@Do you have a strange power saving mode enabled?
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 27.
^M^@Dazed and confused, but trying to continue
^M^@Do you have a strange power saving mode enabled?
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 24.
^M^@ ----------- IPI show regs -----------
^M^@Pid: 11221, comm: cp
^M^@EIP: 0060:[<c02efbdc>] CPU: 5
^M^@Do you have a strange power saving mode enabled?
^M^@EIP is at _spin_lock_irqsave+0x14/0x20
^M^@ EFLAGS: 00000286 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@Dazed and confused, but trying to continue
^M^@EAX: 00000286 EBX: d6ce4800 ECX: c03cabe0 EDX: c049ba84
^M^@ESI: ffffffea EDI: d55f8000 EBP: d55f8000 DS: 007b ES: 007b
^M^@Dazed and confused, but trying to continue
^M^@Do you have a strange power saving mode enabled?
^M^@Dazed and confused, but trying to continue
^M^@Do you have a strange power saving mode enabled?
^M^@Dazed and confused, but trying to continue
^M^@CR0: 80050033 CR2: bfc7d2fc CR3: 16dd02e0 CR4: 000006b0
^M^@ [<c0270377>]Uhhuh. NMI received for unknown reason 00 on CPU 31.
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 12.
^M^@ ahc_linux_proc_info+0x27/0x212
^M^@Do you have a strange power saving mode enabled?
^M^@Do you have a strange power saving mode enabled?
^M^@ [<c0149052>]Do you have a strange power saving mode enabled?
^M^@Dazed and confused, but trying to continue
^M^@Do you have a strange power saving mode enabled?
^M^@ page_add_anon_rmap+0x62/0x68
^M^@ [<c0144358>]Dazed and confused, but trying to continue
^M^@Do you have a strange power saving mode enabled?
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 15.
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 28.
^M^@Dazed and confused, but trying to continue
^M^@ do_anonymous_page+0x1f0/0x21c
^M^@ [<c0144370>]Dazed and confused, but trying to continue
^M^@Do you have a strange power saving mode enabled?
^M^@ do_anonymous_page+0x208/0x21c
^M^@Dazed and confused, but trying to continue
^M^@ [<c01443d9>]Do you have a strange power saving mode enabled?
^M^@Dazed and confused, but trying to continue
^M^@Do you have a strange power saving mode enabled?
^M^@Do you have a strange power saving mode enabled?
^M^@ do_no_page+0x55/0x3e8
^M^@ [<c01372b5>] prep_new_page+0x49/0x50
^M^@ [<c0137973>] buffered_rmqueue+0x16f/0x1d0
^M^@ [<c0137e1b>] __alloc_pages+0x3bb/0x3c8
^M^@ [<c0257cdb>] proc_scsi_read+0x2b/0x44
^M^@ [<c0182f28>] proc_file_read+0xec/0x200
^M^@ [<c0152ff9>] vfs_read+0x91/0x12c
^M^@ [<c01532e4>] sys_read+0x40/0x6c
^M^@ [<c0102a19>] syscall_call+0x7/0xb
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 7
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d740c000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: 00000000 CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 4
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d7404000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: 080f9c48 CR3: 17771320 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c02efcae>] CPU: 30
^M^@EIP is at _spin_lock+0xa/0x10
^M^@ EFLAGS: 00000046 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: c1050aa0 EBX: c1050aa0 ECX: d7463ea8 EDX: 00000003
^M^@ESI: c10d9620 EDI: c10d9fe0 EBP: d7463eb0 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: b7eea900 CR3: 00474000 CR4: 000006b0
^M^@ [<c011583b>] load_balance+0xcf/0x170
^M^@ [<c0115af5>] rebalance_tick+0xe1/0x104
^M^@ [<c0115d77>] scheduler_tick+0x97/0x318
^M^@ [<c01225b3>] update_process_times+0xef/0x100
^M^@ [<c010f5f9>] smp_apic_timer_interrupt+0xd5/0xe4
^M^@ [<c0103464>] apic_timer_interrupt+0x1c/0x24
^M^@ [<c0100bb0>] default_idle+0x0/0x2c
^M^@ [<c0100bd3>] default_idle+0x23/0x2c
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c02efb6a>] CPU: 15
^M^@EIP is at _spin_trylock+0x6/0x14
^M^@ EFLAGS: 00000046 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c1050aa0 ECX: 00000008 EDX: c1050aa0
^M^@ESI: c10875a0 EDI: c1087f60 EBP: d741fe84 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: 00000000 CR3: 00474000 CR4: 000006b0
^M^@ [<c0114fda>] double_lock_balance+0x12/0x48
^M^@ [<c01157e4>] load_balance+0x78/0x170
^M^@ [<c0115af5>] rebalance_tick+0xe1/0x104
^M^@ [<c0115d77>] scheduler_tick+0x97/0x318
^M^@ [<c01225b3>] update_process_times+0xef/0x100
^M^@ [<c010f5f9>] smp_apic_timer_interrupt+0xd5/0xe4
^M^@ [<c0103464>] apic_timer_interrupt+0x1c/0x24
^M^@ [<c0100bb0>] default_idle+0x0/0x2c
^M^@ [<c0100bd3>] default_idle+0x23/0x2c
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 21
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d742c000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: 00000000 CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 14
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d741c000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: b7e64070 CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 27
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d745c000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: b7f66d9c CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 8
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d740e000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: 080f133c CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 25
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d7436000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: b7f74d9c CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c02efb6a>] CPU: 29
^M^@EIP is at _spin_trylock+0x6/0x14
^M^@ EFLAGS: 00000046 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000001 EBX: c1050aa0 ECX: 00000008 EDX: c1050aa0
^M^@ESI: c10d3ea0 EDI: c10d4860 EBP: d7461e84 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: 00000000 CR3: 00474000 CR4: 000006b0
^M^@ [<c0114fda>] double_lock_balance+0x12/0x48
^M^@ [<c01157e4>] load_balance+0x78/0x170
^M^@ [<c0115af5>] rebalance_tick+0xe1/0x104
^M^@ [<c0115d77>] scheduler_tick+0x97/0x318
^M^@ [<c01225b3>] update_process_times+0xef/0x100
^M^@ [<c010f5f9>] smp_apic_timer_interrupt+0xd5/0xe4
^M^@ [<c0103464>] apic_timer_interrupt+0x1c/0x24
^M^@ [<c0100bb0>] default_idle+0x0/0x2c
^M^@ [<c0100bd3>] default_idle+0x23/0x2c
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 31
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d7464000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: 00000000 CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 24
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d7434000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: b7f3cdd8 CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 10
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d7412000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: b7ea6920 CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 26
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d7438000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: 00000000 CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c01154a3>] CPU: 13
^M^@EIP is at find_busiest_group+0x103/0x2f8
^M^@ EFLAGS: 00000086 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000005 EBX: 00000005 ECX: c1050aa0 EDX: 00000000
^M^@ESI: c04813ac EDI: 00000200 EBP: d741be7c DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: b7e7e070 CR3: 00474000 CR4: 000006b0
^M^@ [<c01157a2>] load_balance+0x36/0x170
^M^@ [<c0115af5>] rebalance_tick+0xe1/0x104
^M^@ [<c0115d77>] scheduler_tick+0x97/0x318
^M^@ [<c01225b3>] update_process_times+0xef/0x100
^M^@ [<c010f5f9>] smp_apic_timer_interrupt+0xd5/0xe4
^M^@ [<c0103464>] apic_timer_interrupt+0x1c/0x24
^M^@ [<c0100bb0>] default_idle+0x0/0x2c
^M^@ [<c0100bd3>] default_idle+0x23/0x2c
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 28
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d745e000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: 00000000 CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c011e897>] CPU: 12
^M^@EIP is at __do_softirq+0x47/0x100
^M^@ EFLAGS: 00000006 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: c0470380 EBX: c0476020 ECX: 00000030 EDX: c1075ce0
^M^@ESI: 00000002 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: b7f54000 CR3: 00474000 CR4: 000006b0
^M^@ [<c011e97f>] do_softirq+0x2f/0x34
^M^@ [<c011ea24>] irq_exit+0x34/0x38
^M^@ [<c010f601>] smp_apic_timer_interrupt+0xdd/0xe4
^M^@ [<c0103464>] apic_timer_interrupt+0x1c/0x24
^M^@ [<c0100bb0>] default_idle+0x0/0x2c
^M^@ [<c0100bd3>] default_idle+0x23/0x2c
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 9
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d7410000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: b7f1d900 CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 11
^M^@ EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d7414000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: 00000000 CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 23
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d7432000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: 00000000 CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 6
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d7408000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: b7f3cdd8 CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 22
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d7430000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: 00000000 CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ Dazed and confused, but trying to continue
^M^@Do you have a strange power saving mode enabled?
^M^@----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 1
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: c13fc000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: b7ee1d9c CR3: 17771640 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ^M

#14 lore raw
Quoted 3 lines · Martin J. Bligh

alt+sysrq+p does wierd stuff (is that new patch in your tree Andrew?
doesn't seem to inter-react with the other NMI code well)

What patch?

#15 lore raw
Quoted 6 lines · --On Wednesday, June 08, 2005 16:22:47 -0700 Andrew Morton <[email protected]>…
Quoted 3 lines · Martin J. Bligh

alt+sysrq+p does wierd stuff (is that new patch in your tree Andrew?
doesn't seem to inter-react with the other NMI code well)

What patch?

Sorry.

nmi-lockup-and-altsysrq-p-dumping-calltraces-on-_all_-cpus.patch

It does seem to work. But probably needs some cleanup for the NMI errors.

#16 lore raw
Quoted 11 lines
Quoted 6 lines · --On Wednesday, June 08, 2005 16:22:47 -0700 Andrew Morton <[email protected]>…
Quoted 2 lines · Martin J. Bligh

alt+sysrq+p does wierd stuff (is that new patch in your tree Andrew? doesn't seem to inter-react with the other NMI code well)

What patch?

Quoted 6 lines

Sorry.

nmi-lockup-and-altsysrq-p-dumping-calltraces-on-_all_-cpus.patch

It does seem to work. But probably needs some cleanup for the NMI errors.

If you give me to know where the problem come from I can fix it and make a cleanup.

Kirill

#17 lore raw

--Kirill Korotaev <[email protected]> wrote (on Thursday, June 09, 2005 11:17:43 +0400):

Quoted 11 lines
Quoted 11 lines
Quoted 6 lines · --On Wednesday, June 08, 2005 16:22:47 -0700 Andrew Morton <[email protected]>…
Quoted 2 lines · Martin J. Bligh

alt+sysrq+p does wierd stuff (is that new patch in your tree Andrew? doesn't seem to inter-react with the other NMI code well)

What patch?

Quoted 7 lines
Quoted 6 lines

Sorry.

nmi-lockup-and-altsysrq-p-dumping-calltraces-on-_all_-cpus.patch

It does seem to work. But probably needs some cleanup for the NMI errors.

If you give me to know where the problem come from I can fix it and make a cleanup.

It gets a lot of the "dazed and confused" errors. Possibly you just need to disable that part of the handler?

Command> break
^@SysRq : Show Regs
^M
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 0
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: c040e000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: b7e3f5a0 CR3: 16dd0300 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c01002c8>] rest_init+0x28/0x2c
^M^@ [<c0410899>] start_kernel+0x19d/0x1a0
^M^@ Uhhuh. NMI received for unknown reason 00 on CPU 1.
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 16.
^M^@Dazed and confused, but trying to continue
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 3.
^M^@Do you have a strange power saving mode enabled?
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 17.
^M^@----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 16
^M^@EIP is at default_idle+0x23/0x2c
^M^@Dazed and confused, but trying to continue
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 2.
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 18.
^M^@Dazed and confused, but trying to continue
^M^@Do you have a strange power saving mode enabled?
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@Do you have a strange power saving mode enabled?
^M^@Dazed and confused, but trying to continue
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 19.
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d7420000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@Do you have a strange power saving mode enabled?
^M^@Dazed and confused, but trying to continue
^M^@Do you have a strange power saving mode enabled?
^M^@CR0: 8005003b CR2: 00000000 CR3: 17771800 CR4: 000006b0
^M^@Dazed and confused, but trying to continue
^M^@Do you have a strange power saving mode enabled?
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>]Uhhuh. NMI received for unknown reason 00 on CPU 6.
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 20.
^M^@ start_secondary+0x13d/0x140
^M^@Dazed and confused, but trying to continue
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 18
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 10.
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d7426000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: b7f25d9c CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>]Uhhuh. NMI received for unknown reason 00 on CPU 29.
^M^@ cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 2
^M^@ EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d7400000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: b7edeb00 CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>]Uhhuh. NMI received for unknown reason 00 on CPU 23.
^M^@ start_secondary+0x13d/0x140
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 7.
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 3
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d7402000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@Do you have a strange power saving mode enabled?
^M^@CR0: 8005003b CR2: b7f95438 CR3: 17771800 CR4: 000006b0
^M^@ [<c0100ca3>]Uhhuh. NMI received for unknown reason 00 on CPU 4.
^M^@ cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 17
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 5.
^M^@Dazed and confused, but trying to continue
^M^@EIP is at default_idle+0x23/0x2c
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 14.
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d7424000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: 00000000 CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>]Uhhuh. NMI received for unknown reason 00 on CPU 9.
^M^@ cpu_idle+0x7b/0x8c
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 25.
^M^@ [<c010e79d>] start_secondary+0x13d/0x140Dazed and confused, but trying to continue ^M
^M^@----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 19
^M^@ EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d7428000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: b7f30d9c CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>]Uhhuh. NMI received for unknown reason 00 on CPU 13.
^M^@ start_secondary+0x13d/0x140
^M^@ Do you have a strange power saving mode enabled?
^M^@----------- IPI show regs -----------Uhhuh. NMI received for unknown reason 00 on CPU 8. ^M^@Uhhuh. NMI received for unknown reason 00 on CPU 11.
^M^@Dazed and confused, but trying to continue
^M^@Dazed and confused, but trying to continue
^M^@Dazed and confused, but trying to continue
^M
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 20
^M^@Dazed and confused, but trying to continue
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 22.
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 26.
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@Dazed and confused, but trying to continue
^M^@Do you have a strange power saving mode enabled?
^M^@Dazed and confused, but trying to continue
^M^@Do you have a strange power saving mode enabled?
^M^@ESI: d742a000 EDI: c0470300 EBP: c0470300Uhhuh. NMI received for unknown reason 00 on CPU 30. ^M^@Dazed and confused, but trying to continue
^M^@Do you have a strange power saving mode enabled?
^M^@Do you have a strange power saving mode enabled?
^M^@Do you have a strange power saving mode enabled?
^M^@ DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: 00000000 CR3: 00474000 CR4: 000006b0
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 21.
^M^@ [<c0100ca3>]Dazed and confused, but trying to continue
^M^@Do you have a strange power saving mode enabled?
^M^@Dazed and confused, but trying to continue
^M^@Do you have a strange power saving mode enabled?
^M^@ cpu_idle+0x7b/0x8c
^M^@Dazed and confused, but trying to continue
^M^@ [<c010e79d>]Do you have a strange power saving mode enabled?
^M^@ start_secondary+0x13d/0x140
^M^@Do you have a strange power saving mode enabled?
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 27.
^M^@Dazed and confused, but trying to continue
^M^@Do you have a strange power saving mode enabled?
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 24.
^M^@ ----------- IPI show regs -----------
^M^@Pid: 11221, comm: cp
^M^@EIP: 0060:[<c02efbdc>] CPU: 5
^M^@Do you have a strange power saving mode enabled?
^M^@EIP is at _spin_lock_irqsave+0x14/0x20
^M^@ EFLAGS: 00000286 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@Dazed and confused, but trying to continue
^M^@EAX: 00000286 EBX: d6ce4800 ECX: c03cabe0 EDX: c049ba84
^M^@ESI: ffffffea EDI: d55f8000 EBP: d55f8000 DS: 007b ES: 007b
^M^@Dazed and confused, but trying to continue
^M^@Do you have a strange power saving mode enabled?
^M^@Dazed and confused, but trying to continue
^M^@Do you have a strange power saving mode enabled?
^M^@Dazed and confused, but trying to continue
^M^@CR0: 80050033 CR2: bfc7d2fc CR3: 16dd02e0 CR4: 000006b0
^M^@ [<c0270377>]Uhhuh. NMI received for unknown reason 00 on CPU 31.
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 12.
^M^@ ahc_linux_proc_info+0x27/0x212
^M^@Do you have a strange power saving mode enabled?
^M^@Do you have a strange power saving mode enabled?
^M^@ [<c0149052>]Do you have a strange power saving mode enabled?
^M^@Dazed and confused, but trying to continue
^M^@Do you have a strange power saving mode enabled?
^M^@ page_add_anon_rmap+0x62/0x68
^M^@ [<c0144358>]Dazed and confused, but trying to continue
^M^@Do you have a strange power saving mode enabled?
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 15.
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 28.
^M^@Dazed and confused, but trying to continue
^M^@ do_anonymous_page+0x1f0/0x21c
^M^@ [<c0144370>]Dazed and confused, but trying to continue
^M^@Do you have a strange power saving mode enabled?
^M^@ do_anonymous_page+0x208/0x21c
^M^@Dazed and confused, but trying to continue
^M^@ [<c01443d9>]Do you have a strange power saving mode enabled?
^M^@Dazed and confused, but trying to continue
^M^@Do you have a strange power saving mode enabled?
^M^@Do you have a strange power saving mode enabled?
^M^@ do_no_page+0x55/0x3e8
^M^@ [<c01372b5>] prep_new_page+0x49/0x50
^M^@ [<c0137973>] buffered_rmqueue+0x16f/0x1d0
^M^@ [<c0137e1b>] __alloc_pages+0x3bb/0x3c8
^M^@ [<c0257cdb>] proc_scsi_read+0x2b/0x44
^M^@ [<c0182f28>] proc_file_read+0xec/0x200
^M^@ [<c0152ff9>] vfs_read+0x91/0x12c
^M^@ [<c01532e4>] sys_read+0x40/0x6c
^M^@ [<c0102a19>] syscall_call+0x7/0xb
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 7
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d740c000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: 00000000 CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 4
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d7404000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: 080f9c48 CR3: 17771320 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c02efcae>] CPU: 30
^M^@EIP is at _spin_lock+0xa/0x10
^M^@ EFLAGS: 00000046 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: c1050aa0 EBX: c1050aa0 ECX: d7463ea8 EDX: 00000003
^M^@ESI: c10d9620 EDI: c10d9fe0 EBP: d7463eb0 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: b7eea900 CR3: 00474000 CR4: 000006b0
^M^@ [<c011583b>] load_balance+0xcf/0x170
^M^@ [<c0115af5>] rebalance_tick+0xe1/0x104
^M^@ [<c0115d77>] scheduler_tick+0x97/0x318
^M^@ [<c01225b3>] update_process_times+0xef/0x100
^M^@ [<c010f5f9>] smp_apic_timer_interrupt+0xd5/0xe4
^M^@ [<c0103464>] apic_timer_interrupt+0x1c/0x24
^M^@ [<c0100bb0>] default_idle+0x0/0x2c
^M^@ [<c0100bd3>] default_idle+0x23/0x2c
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c02efb6a>] CPU: 15
^M^@EIP is at _spin_trylock+0x6/0x14
^M^@ EFLAGS: 00000046 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c1050aa0 ECX: 00000008 EDX: c1050aa0
^M^@ESI: c10875a0 EDI: c1087f60 EBP: d741fe84 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: 00000000 CR3: 00474000 CR4: 000006b0
^M^@ [<c0114fda>] double_lock_balance+0x12/0x48
^M^@ [<c01157e4>] load_balance+0x78/0x170
^M^@ [<c0115af5>] rebalance_tick+0xe1/0x104
^M^@ [<c0115d77>] scheduler_tick+0x97/0x318
^M^@ [<c01225b3>] update_process_times+0xef/0x100
^M^@ [<c010f5f9>] smp_apic_timer_interrupt+0xd5/0xe4
^M^@ [<c0103464>] apic_timer_interrupt+0x1c/0x24
^M^@ [<c0100bb0>] default_idle+0x0/0x2c
^M^@ [<c0100bd3>] default_idle+0x23/0x2c
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 21
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d742c000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: 00000000 CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 14
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d741c000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: b7e64070 CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 27
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d745c000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: b7f66d9c CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 8
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d740e000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: 080f133c CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 25
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d7436000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: b7f74d9c CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c02efb6a>] CPU: 29
^M^@EIP is at _spin_trylock+0x6/0x14
^M^@ EFLAGS: 00000046 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000001 EBX: c1050aa0 ECX: 00000008 EDX: c1050aa0
^M^@ESI: c10d3ea0 EDI: c10d4860 EBP: d7461e84 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: 00000000 CR3: 00474000 CR4: 000006b0
^M^@ [<c0114fda>] double_lock_balance+0x12/0x48
^M^@ [<c01157e4>] load_balance+0x78/0x170
^M^@ [<c0115af5>] rebalance_tick+0xe1/0x104
^M^@ [<c0115d77>] scheduler_tick+0x97/0x318
^M^@ [<c01225b3>] update_process_times+0xef/0x100
^M^@ [<c010f5f9>] smp_apic_timer_interrupt+0xd5/0xe4
^M^@ [<c0103464>] apic_timer_interrupt+0x1c/0x24
^M^@ [<c0100bb0>] default_idle+0x0/0x2c
^M^@ [<c0100bd3>] default_idle+0x23/0x2c
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 31
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d7464000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: 00000000 CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 24
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d7434000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: b7f3cdd8 CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 10
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d7412000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: b7ea6920 CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 26
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d7438000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: 00000000 CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c01154a3>] CPU: 13
^M^@EIP is at find_busiest_group+0x103/0x2f8
^M^@ EFLAGS: 00000086 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000005 EBX: 00000005 ECX: c1050aa0 EDX: 00000000
^M^@ESI: c04813ac EDI: 00000200 EBP: d741be7c DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: b7e7e070 CR3: 00474000 CR4: 000006b0
^M^@ [<c01157a2>] load_balance+0x36/0x170
^M^@ [<c0115af5>] rebalance_tick+0xe1/0x104
^M^@ [<c0115d77>] scheduler_tick+0x97/0x318
^M^@ [<c01225b3>] update_process_times+0xef/0x100
^M^@ [<c010f5f9>] smp_apic_timer_interrupt+0xd5/0xe4
^M^@ [<c0103464>] apic_timer_interrupt+0x1c/0x24
^M^@ [<c0100bb0>] default_idle+0x0/0x2c
^M^@ [<c0100bd3>] default_idle+0x23/0x2c
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 28
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d745e000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: 00000000 CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c011e897>] CPU: 12
^M^@EIP is at __do_softirq+0x47/0x100
^M^@ EFLAGS: 00000006 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: c0470380 EBX: c0476020 ECX: 00000030 EDX: c1075ce0
^M^@ESI: 00000002 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: b7f54000 CR3: 00474000 CR4: 000006b0
^M^@ [<c011e97f>] do_softirq+0x2f/0x34
^M^@ [<c011ea24>] irq_exit+0x34/0x38
^M^@ [<c010f601>] smp_apic_timer_interrupt+0xdd/0xe4
^M^@ [<c0103464>] apic_timer_interrupt+0x1c/0x24
^M^@ [<c0100bb0>] default_idle+0x0/0x2c
^M^@ [<c0100bd3>] default_idle+0x23/0x2c
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 9
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d7410000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: b7f1d900 CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 11
^M^@ EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d7414000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: 00000000 CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 23
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d7432000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: 00000000 CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 6
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d7408000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: b7f3cdd8 CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 22
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d7430000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: 00000000 CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ Dazed and confused, but trying to continue
^M^@Do you have a strange power saving mode enabled?
^M^@----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 1
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: c13fc000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: b7ee1d9c CR3: 17771640 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ^M

#18 lore raw
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alt+sysrq+p does wierd stuff (is that new patch in your tree Andrew? doesn't seem to inter-react with the other NMI code well)

What patch?

Sorry.

nmi-lockup-and-altsysrq-p-dumping-calltraces-on-_all_-cpus.patch

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It does seem to work. But probably needs some cleanup for the NMI errors.

If you give me to know where the problem come from I can fix it and make a cleanup.

It gets a lot of the "dazed and confused" errors. Possibly you just need to disable that part of the handler?

can you try this cleanup patch?
This fixes the problem for me, though I do no like the way it does so very much...

Kirill

Quoted 457 lines

Command> break
^@SysRq : Show Regs
^M
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 0
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: c040e000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: b7e3f5a0 CR3: 16dd0300 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c01002c8>] rest_init+0x28/0x2c
^M^@ [<c0410899>] start_kernel+0x19d/0x1a0
^M^@ Uhhuh. NMI received for unknown reason 00 on CPU 1.
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 16.
^M^@Dazed and confused, but trying to continue
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 3.
^M^@Do you have a strange power saving mode enabled?
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 17.
^M^@----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 16
^M^@EIP is at default_idle+0x23/0x2c
^M^@Dazed and confused, but trying to continue
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 2.
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 18.
^M^@Dazed and confused, but trying to continue
^M^@Do you have a strange power saving mode enabled?
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@Do you have a strange power saving mode enabled?
^M^@Dazed and confused, but trying to continue
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 19.
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d7420000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@Do you have a strange power saving mode enabled?
^M^@Dazed and confused, but trying to continue
^M^@Do you have a strange power saving mode enabled?
^M^@CR0: 8005003b CR2: 00000000 CR3: 17771800 CR4: 000006b0
^M^@Dazed and confused, but trying to continue
^M^@Do you have a strange power saving mode enabled?
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>]Uhhuh. NMI received for unknown reason 00 on CPU 6.
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 20.
^M^@ start_secondary+0x13d/0x140
^M^@Dazed and confused, but trying to continue
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 18
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 10.
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d7426000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: b7f25d9c CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>]Uhhuh. NMI received for unknown reason 00 on CPU 29.
^M^@ cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 2
^M^@ EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d7400000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: b7edeb00 CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>]Uhhuh. NMI received for unknown reason 00 on CPU 23.
^M^@ start_secondary+0x13d/0x140
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 7.
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 3
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d7402000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@Do you have a strange power saving mode enabled?
^M^@CR0: 8005003b CR2: b7f95438 CR3: 17771800 CR4: 000006b0
^M^@ [<c0100ca3>]Uhhuh. NMI received for unknown reason 00 on CPU 4.
^M^@ cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 17
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 5.
^M^@Dazed and confused, but trying to continue
^M^@EIP is at default_idle+0x23/0x2c
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 14.
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d7424000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: 00000000 CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>]Uhhuh. NMI received for unknown reason 00 on CPU 9.
^M^@ cpu_idle+0x7b/0x8c
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 25.
^M^@ [<c010e79d>] start_secondary+0x13d/0x140Dazed and confused, but trying to continue ^M
^M^@----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 19
^M^@ EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d7428000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: b7f30d9c CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>]Uhhuh. NMI received for unknown reason 00 on CPU 13.
^M^@ start_secondary+0x13d/0x140
^M^@ Do you have a strange power saving mode enabled?
^M^@----------- IPI show regs -----------Uhhuh. NMI received for unknown reason 00 on CPU 8. ^M^@Uhhuh. NMI received for unknown reason 00 on CPU 11.
^M^@Dazed and confused, but trying to continue
^M^@Dazed and confused, but trying to continue
^M^@Dazed and confused, but trying to continue
^M
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 20
^M^@Dazed and confused, but trying to continue
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 22.
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 26.
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@Dazed and confused, but trying to continue
^M^@Do you have a strange power saving mode enabled?
^M^@Dazed and confused, but trying to continue
^M^@Do you have a strange power saving mode enabled?
^M^@ESI: d742a000 EDI: c0470300 EBP: c0470300Uhhuh. NMI received for unknown reason 00 on CPU 30. ^M^@Dazed and confused, but trying to continue
^M^@Do you have a strange power saving mode enabled?
^M^@Do you have a strange power saving mode enabled?
^M^@Do you have a strange power saving mode enabled?
^M^@ DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: 00000000 CR3: 00474000 CR4: 000006b0
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 21.
^M^@ [<c0100ca3>]Dazed and confused, but trying to continue
^M^@Do you have a strange power saving mode enabled?
^M^@Dazed and confused, but trying to continue
^M^@Do you have a strange power saving mode enabled?
^M^@ cpu_idle+0x7b/0x8c
^M^@Dazed and confused, but trying to continue
^M^@ [<c010e79d>]Do you have a strange power saving mode enabled?
^M^@ start_secondary+0x13d/0x140
^M^@Do you have a strange power saving mode enabled?
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 27.
^M^@Dazed and confused, but trying to continue
^M^@Do you have a strange power saving mode enabled?
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 24.
^M^@ ----------- IPI show regs -----------
^M^@Pid: 11221, comm: cp
^M^@EIP: 0060:[<c02efbdc>] CPU: 5
^M^@Do you have a strange power saving mode enabled?
^M^@EIP is at _spin_lock_irqsave+0x14/0x20
^M^@ EFLAGS: 00000286 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@Dazed and confused, but trying to continue
^M^@EAX: 00000286 EBX: d6ce4800 ECX: c03cabe0 EDX: c049ba84
^M^@ESI: ffffffea EDI: d55f8000 EBP: d55f8000 DS: 007b ES: 007b
^M^@Dazed and confused, but trying to continue
^M^@Do you have a strange power saving mode enabled?
^M^@Dazed and confused, but trying to continue
^M^@Do you have a strange power saving mode enabled?
^M^@Dazed and confused, but trying to continue
^M^@CR0: 80050033 CR2: bfc7d2fc CR3: 16dd02e0 CR4: 000006b0
^M^@ [<c0270377>]Uhhuh. NMI received for unknown reason 00 on CPU 31.
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 12.
^M^@ ahc_linux_proc_info+0x27/0x212
^M^@Do you have a strange power saving mode enabled?
^M^@Do you have a strange power saving mode enabled?
^M^@ [<c0149052>]Do you have a strange power saving mode enabled?
^M^@Dazed and confused, but trying to continue
^M^@Do you have a strange power saving mode enabled?
^M^@ page_add_anon_rmap+0x62/0x68
^M^@ [<c0144358>]Dazed and confused, but trying to continue
^M^@Do you have a strange power saving mode enabled?
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 15.
^M^@Uhhuh. NMI received for unknown reason 00 on CPU 28.
^M^@Dazed and confused, but trying to continue
^M^@ do_anonymous_page+0x1f0/0x21c
^M^@ [<c0144370>]Dazed and confused, but trying to continue
^M^@Do you have a strange power saving mode enabled?
^M^@ do_anonymous_page+0x208/0x21c
^M^@Dazed and confused, but trying to continue
^M^@ [<c01443d9>]Do you have a strange power saving mode enabled?
^M^@Dazed and confused, but trying to continue
^M^@Do you have a strange power saving mode enabled?
^M^@Do you have a strange power saving mode enabled?
^M^@ do_no_page+0x55/0x3e8
^M^@ [<c01372b5>] prep_new_page+0x49/0x50
^M^@ [<c0137973>] buffered_rmqueue+0x16f/0x1d0
^M^@ [<c0137e1b>] __alloc_pages+0x3bb/0x3c8
^M^@ [<c0257cdb>] proc_scsi_read+0x2b/0x44
^M^@ [<c0182f28>] proc_file_read+0xec/0x200
^M^@ [<c0152ff9>] vfs_read+0x91/0x12c
^M^@ [<c01532e4>] sys_read+0x40/0x6c
^M^@ [<c0102a19>] syscall_call+0x7/0xb
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 7
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d740c000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: 00000000 CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 4
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d7404000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: 080f9c48 CR3: 17771320 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c02efcae>] CPU: 30
^M^@EIP is at _spin_lock+0xa/0x10
^M^@ EFLAGS: 00000046 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: c1050aa0 EBX: c1050aa0 ECX: d7463ea8 EDX: 00000003
^M^@ESI: c10d9620 EDI: c10d9fe0 EBP: d7463eb0 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: b7eea900 CR3: 00474000 CR4: 000006b0
^M^@ [<c011583b>] load_balance+0xcf/0x170
^M^@ [<c0115af5>] rebalance_tick+0xe1/0x104
^M^@ [<c0115d77>] scheduler_tick+0x97/0x318
^M^@ [<c01225b3>] update_process_times+0xef/0x100
^M^@ [<c010f5f9>] smp_apic_timer_interrupt+0xd5/0xe4
^M^@ [<c0103464>] apic_timer_interrupt+0x1c/0x24
^M^@ [<c0100bb0>] default_idle+0x0/0x2c
^M^@ [<c0100bd3>] default_idle+0x23/0x2c
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@----------- IPI show regs ----------- ^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c02efb6a>] CPU: 15
^M^@EIP is at _spin_trylock+0x6/0x14
^M^@ EFLAGS: 00000046 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c1050aa0 ECX: 00000008 EDX: c1050aa0
^M^@ESI: c10875a0 EDI: c1087f60 EBP: d741fe84 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: 00000000 CR3: 00474000 CR4: 000006b0
^M^@ [<c0114fda>] double_lock_balance+0x12/0x48
^M^@ [<c01157e4>] load_balance+0x78/0x170
^M^@ [<c0115af5>] rebalance_tick+0xe1/0x104
^M^@ [<c0115d77>] scheduler_tick+0x97/0x318
^M^@ [<c01225b3>] update_process_times+0xef/0x100
^M^@ [<c010f5f9>] smp_apic_timer_interrupt+0xd5/0xe4
^M^@ [<c0103464>] apic_timer_interrupt+0x1c/0x24
^M^@ [<c0100bb0>] default_idle+0x0/0x2c
^M^@ [<c0100bd3>] default_idle+0x23/0x2c
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 21
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d742c000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: 00000000 CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 14
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d741c000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: b7e64070 CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 27
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d745c000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: b7f66d9c CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 8
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d740e000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: 080f133c CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 25
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d7436000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: b7f74d9c CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c02efb6a>] CPU: 29
^M^@EIP is at _spin_trylock+0x6/0x14
^M^@ EFLAGS: 00000046 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000001 EBX: c1050aa0 ECX: 00000008 EDX: c1050aa0
^M^@ESI: c10d3ea0 EDI: c10d4860 EBP: d7461e84 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: 00000000 CR3: 00474000 CR4: 000006b0
^M^@ [<c0114fda>] double_lock_balance+0x12/0x48
^M^@ [<c01157e4>] load_balance+0x78/0x170
^M^@ [<c0115af5>] rebalance_tick+0xe1/0x104
^M^@ [<c0115d77>] scheduler_tick+0x97/0x318
^M^@ [<c01225b3>] update_process_times+0xef/0x100
^M^@ [<c010f5f9>] smp_apic_timer_interrupt+0xd5/0xe4
^M^@ [<c0103464>] apic_timer_interrupt+0x1c/0x24
^M^@ [<c0100bb0>] default_idle+0x0/0x2c
^M^@ [<c0100bd3>] default_idle+0x23/0x2c
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 31
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d7464000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: 00000000 CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 24
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d7434000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: b7f3cdd8 CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 10
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d7412000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: b7ea6920 CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 26
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d7438000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: 00000000 CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c01154a3>] CPU: 13
^M^@EIP is at find_busiest_group+0x103/0x2f8
^M^@ EFLAGS: 00000086 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000005 EBX: 00000005 ECX: c1050aa0 EDX: 00000000
^M^@ESI: c04813ac EDI: 00000200 EBP: d741be7c DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: b7e7e070 CR3: 00474000 CR4: 000006b0
^M^@ [<c01157a2>] load_balance+0x36/0x170
^M^@ [<c0115af5>] rebalance_tick+0xe1/0x104
^M^@ [<c0115d77>] scheduler_tick+0x97/0x318
^M^@ [<c01225b3>] update_process_times+0xef/0x100
^M^@ [<c010f5f9>] smp_apic_timer_interrupt+0xd5/0xe4
^M^@ [<c0103464>] apic_timer_interrupt+0x1c/0x24
^M^@ [<c0100bb0>] default_idle+0x0/0x2c
^M^@ [<c0100bd3>] default_idle+0x23/0x2c
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 28
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d745e000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: 00000000 CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c011e897>] CPU: 12
^M^@EIP is at __do_softirq+0x47/0x100
^M^@ EFLAGS: 00000006 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: c0470380 EBX: c0476020 ECX: 00000030 EDX: c1075ce0
^M^@ESI: 00000002 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: b7f54000 CR3: 00474000 CR4: 000006b0
^M^@ [<c011e97f>] do_softirq+0x2f/0x34
^M^@ [<c011ea24>] irq_exit+0x34/0x38
^M^@ [<c010f601>] smp_apic_timer_interrupt+0xdd/0xe4
^M^@ [<c0103464>] apic_timer_interrupt+0x1c/0x24
^M^@ [<c0100bb0>] default_idle+0x0/0x2c
^M^@ [<c0100bd3>] default_idle+0x23/0x2c
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 9
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d7410000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: b7f1d900 CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 11
^M^@ EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d7414000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: 00000000 CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 23
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d7432000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: 00000000 CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@----------- IPI show regs ----------- ^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 6
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d7408000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: b7f3cdd8 CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@----------- IPI show regs ----------- ^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 22
^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43
^M^@ESI: d7430000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b
^M^@CR0: 8005003b CR2: 00000000 CR3: 00474000 CR4: 000006b0
^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ Dazed and confused, but trying to continue
^M^@Do you have a strange power saving mode enabled?
^M^@----------- IPI show regs -----------
^M^@Pid: 0, comm: swapper
^M^@EIP: 0060:[<c0100bd3>] CPU: 1

Quoted 14 lines

^M^@EIP is at default_idle+0x23/0x2c
^M^@ EFLAGS: 00000246 Not tainted (2.6.12-rc6-mm1-autokern1)
^M^@EAX: 00000000 EBX: c0476020 ECX: c0100bb0 EDX: 003a2f43 ^M^@ESI: c13fc000 EDI: c0470300 EBP: c0470300 DS: 007b ES: 007b ^M^@CR0: 8005003b CR2: b7ee1d9c CR3: 17771640 CR4: 000006b0 ^M^@ [<c0100ca3>] cpu_idle+0x7b/0x8c
^M^@ [<c010e79d>] start_secondary+0x13d/0x140
^M^@ ^M

arch/i386/kernel/traps.c renamed from arch/i386/kernel/traps.c.xxx +11 -8
@@ -574,6 +574,14 @@ void die_nmi (struct pt_regs *regs, cons
 	do_exit(SIGSEGV);
 }
 
+static int dummy_nmi_callback(struct pt_regs * regs, int cpu)
+{
+	return 0;
+}
+ 
+static nmi_callback_t nmi_callback = dummy_nmi_callback;
+static nmi_callback_t nmi_ipi_callback = dummy_nmi_callback;
+ 
 static void default_do_nmi(struct pt_regs * regs)
 {
 	unsigned char reason = 0;
@@ -596,6 +604,9 @@ static void default_do_nmi(struct pt_reg
 			return;
 		}
 #endif
+		if (nmi_ipi_callback != dummy_nmi_callback)
+			return;
+
 		unknown_nmi_error(reason, regs);
 		return;
 	}
@@ -612,14 +623,6 @@ static void default_do_nmi(struct pt_reg
 	reassert_nmi();
 }
 
-static int dummy_nmi_callback(struct pt_regs * regs, int cpu)
-{
-	return 0;
-}
- 
-static nmi_callback_t nmi_callback = dummy_nmi_callback;
-static nmi_callback_t nmi_ipi_callback = dummy_nmi_callback;
- 
 fastcall void do_nmi(struct pt_regs * regs, long error_code)
 {
 	int cpu;
#19 lore raw
In reply to Andy Whitcroft
Quoted 11 lines · Andy Whitcroft

We've been seeing an early boot hang on IBM x-series (at least on an x440) with -rc6-mm1. Finally got hold of a box to go search for this and it seems that backing out the three patches below fixes it.

 515  dmi-move-acpi-boot-quirk.patch
 516  dmi-move-acpi-sleep-quirk.patch
 517  dmi-remove-central-blacklist.patch

I am pretty sure it is actually the first one (thats where my bisection search pointed) but I had to drop the other two to back it out. Anyhow, 2.6.12-rc6-mm1 boots on an x440 with these backed out.

Yeah, probably brown paper bag time... Please try the attached patch.

Signature · 2 lines
Andrey Panin		| Linux and UNIX system administrator
[email protected]		| PGP key: wwwkeys.pgp.net
arch/i386/kernel/acpi/boot.c +1 -0
diff -urdpNX /usr/share/dontdiff linux-2.6.12-rc6-mm1.vanilla/arch/i386/kernel/acpi/boot.c linux-2.6.12-rc6-mm1/arch/i386/kernel/acpi/boot.c
@@ -1040,6 +1040,7 @@ static struct dmi_system_id __initdata a
 		},
 	},
 #endif
+	{ }
 };
 
 #endif	/* __i386__ */
arch/i386/kernel/acpi/sleep.c +1 -0
diff -urdpNX /usr/share/dontdiff linux-2.6.12-rc6-mm1.vanilla/arch/i386/kernel/acpi/sleep.c linux-2.6.12-rc6-mm1/arch/i386/kernel/acpi/sleep.c
@@ -108,6 +108,7 @@ static __initdata struct dmi_system_id a
 			DMI_MATCH(DMI_PRODUCT_NAME, "S4030CDT/4.3"),
 		},
 	},
+	{ }
 };
 
 static int __init acpisleep_dmi_init(void)
#20 lore raw
Quoted 1 line · Andrey Panin

Yeah, probably brown paper bag time... Please try the attached patch.

Ok. I can confirm that linux-2.6.12-rc6-mm1 + just this fix boots fine and works. And yes I said works? I can't understand why backing the others out left us with the odd spin hang and this combination doesn't.
I've managed to run 4 sets of boot and kernbench (10 runs) without a hang.

/me feels there is something else ugly in here we don't want but unrelated to this patch.

-apw

#21 lore raw

BUG in i2c_detach_client

In reply to Andrew Morton

2.6.12-rc5-mm1 didn't crash.

kernel BUG at include/linux/list.h:166!
invalid operand: 0000 [#1]
PREEMPT

CPU:    0
EIP:    0060:[<c0319cd4>]    Not tainted VLI
EFLAGS: 00010a83   (2.6.12-rc6-mm1)

EIP is at i2c_detach_client+0xb4/0x110
eax: dfc0bcc0 ebx: c15fc26c ecx: c15fc264 edx: c04378d0
esi: c15fc14c edi: c0437720 ebp: 00000000 esp: dff81f10
ds: 007b es: 007b ss: 0068
Process swapper (pid: 1, threadinfo=dff80000 task=c14dca00)

Stack: dfff6110 dfc0bdb4 00000286 00000286 c15fc26c c15fc14c c15fc160 ffffffed
       c031d512 c15fc160 c03edac1 c15fc26c 00000000 0000002d 00000001 0000002d
       c0437720 00000000 c0437c5c 00000001 00000000 c031b100 00000000 00000000
Call Trace:
 [<c031d512>] asb100_detect+0x442/0x520
 [<c031b100>] i2c_detect+0x240/0x380
 [<c031d0d0>] asb100_detect+0x0/0x520
 [<c0319889>] i2c_add_driver+0x89/0xc0
 [<c047e7eb>] do_initcalls+0x2b/0xc0
 [<c015a915>] kern_mount+0x15/0x19
 [<c01002b0>] init+0x0/0x110
 [<c01002df>] init+0x2f/0x110
 [<c0100f28>] kernel_thread_helper+0x0/0x18
 [<c0100f2d>] kernel_thread_helper+0x5/0x18
Code: 89 40 04 89 f0 e8 8d 31 fa ff 89 f0 e8 16 34 fa ff ff 47 2c 0f 8e 25 11 

00 00 89 d8 e8 56 53 09 00 89 e8 83 c4 10 5b 5e 5f 5d c3 <0f> 0b a6 00 44 56 3c c0 eb 91 0f 0b a5 00 44 56 3c c0 e9 79 ff
<0>Kernel panic - not syncing: Attempted to kill init!

.config attached.

#
# Automatically generated make config: don't edit
# Linux kernel version: 2.6.12-rc6-mm1
# Wed Jun 8 01:45:54 2005
#
CONFIG_X86=y
CONFIG_MMU=y
CONFIG_UID16=y
CONFIG_GENERIC_ISA_DMA=y
CONFIG_GENERIC_IOMAP=y

#
# Code maturity level options
#
CONFIG_EXPERIMENTAL=y
CONFIG_CLEAN_COMPILE=y
CONFIG_BROKEN_ON_SMP=y
CONFIG_LOCK_KERNEL=y
CONFIG_INIT_ENV_ARG_LIMIT=32

#
# General setup
#
CONFIG_LOCALVERSION=""
CONFIG_SWAP=y
CONFIG_SYSVIPC=y
CONFIG_POSIX_MQUEUE=y
# CONFIG_BSD_PROCESS_ACCT is not set
CONFIG_SYSCTL=y
# CONFIG_AUDIT is not set
CONFIG_HOTPLUG=y
CONFIG_KOBJECT_UEVENT=y
# CONFIG_IKCONFIG is not set
# CONFIG_EMBEDDED is not set
CONFIG_KALLSYMS=y
# CONFIG_KALLSYMS_ALL is not set
# CONFIG_KALLSYMS_EXTRA_PASS is not set
CONFIG_PRINTK=y
CONFIG_BUG=y
CONFIG_BASE_FULL=y
CONFIG_FUTEX=y
CONFIG_EPOLL=y
CONFIG_SHMEM=y
CONFIG_CC_ALIGN_FUNCTIONS=0
CONFIG_CC_ALIGN_LABELS=0
CONFIG_CC_ALIGN_LOOPS=0
CONFIG_CC_ALIGN_JUMPS=0
# CONFIG_TINY_SHMEM is not set
CONFIG_BASE_SMALL=0

#
# Loadable module support
#
# CONFIG_MODULES is not set

#
# Processor type and features
#
CONFIG_X86_PC=y
# CONFIG_X86_ELAN is not set
# CONFIG_X86_VOYAGER is not set
# CONFIG_X86_NUMAQ is not set
# CONFIG_X86_SUMMIT is not set
# CONFIG_X86_BIGSMP is not set
# CONFIG_X86_VISWS is not set
# CONFIG_X86_GENERICARCH is not set
# CONFIG_X86_ES7000 is not set
# CONFIG_M386 is not set
# CONFIG_M486 is not set
# CONFIG_M586 is not set
# CONFIG_M586TSC is not set
# CONFIG_M586MMX is not set
# CONFIG_M686 is not set
# CONFIG_MPENTIUMII is not set
# CONFIG_MPENTIUMIII is not set
# CONFIG_MPENTIUMM is not set
# CONFIG_MPENTIUM4 is not set
# CONFIG_MK6 is not set
CONFIG_MK7=y
# CONFIG_MK8 is not set
# CONFIG_MCRUSOE is not set
# CONFIG_MEFFICEON is not set
# CONFIG_MWINCHIPC6 is not set
# CONFIG_MWINCHIP2 is not set
# CONFIG_MWINCHIP3D is not set
# CONFIG_MGEODEGX1 is not set
# CONFIG_MCYRIXIII is not set
# CONFIG_MVIAC3_2 is not set
# CONFIG_X86_GENERIC is not set
CONFIG_X86_CMPXCHG=y
CONFIG_X86_XADD=y
CONFIG_X86_L1_CACHE_SHIFT=6
CONFIG_RWSEM_XCHGADD_ALGORITHM=y
CONFIG_GENERIC_CALIBRATE_DELAY=y
CONFIG_X86_WP_WORKS_OK=y
CONFIG_X86_INVLPG=y
CONFIG_X86_BSWAP=y
CONFIG_X86_POPAD_OK=y
CONFIG_X86_GOOD_APIC=y
CONFIG_X86_INTEL_USERCOPY=y
CONFIG_X86_USE_PPRO_CHECKSUM=y
CONFIG_X86_USE_3DNOW=y
CONFIG_HPET_TIMER=y
CONFIG_HPET_EMULATE_RTC=y
# CONFIG_SMP is not set
# CONFIG_PREEMPT_NONE is not set
# CONFIG_PREEMPT_VOLUNTARY is not set
CONFIG_PREEMPT=y
CONFIG_PREEMPT_BKL=y
CONFIG_X86_UP_APIC=y
CONFIG_X86_UP_IOAPIC=y
CONFIG_X86_LOCAL_APIC=y
CONFIG_X86_IO_APIC=y
CONFIG_X86_TSC=y
CONFIG_X86_MCE=y
CONFIG_X86_MCE_NONFATAL=y
# CONFIG_X86_MCE_P4THERMAL is not set
# CONFIG_TOSHIBA is not set
# CONFIG_I8K is not set
# CONFIG_X86_REBOOTFIXUPS is not set
# CONFIG_MICROCODE is not set
CONFIG_X86_MSR=y
CONFIG_X86_CPUID=y

#
# Firmware Drivers
#
# CONFIG_EDD is not set
CONFIG_NOHIGHMEM=y
# CONFIG_HIGHMEM4G is not set
# CONFIG_HIGHMEM64G is not set
CONFIG_SELECT_MEMORY_MODEL=y
CONFIG_FLATMEM_MANUAL=y
# CONFIG_DISCONTIGMEM_MANUAL is not set
# CONFIG_SPARSEMEM_MANUAL is not set
CONFIG_FLATMEM=y
CONFIG_FLAT_NODE_MEM_MAP=y
# CONFIG_MATH_EMULATION is not set
CONFIG_MTRR=y
# CONFIG_EFI is not set
CONFIG_HAVE_DEC_LOCK=y
CONFIG_REGPARM=y
CONFIG_SECCOMP=y
# CONFIG_HZ_100 is not set
CONFIG_HZ_250=y
# CONFIG_HZ_1000 is not set
CONFIG_HZ=250

#
# Performance-monitoring counters support
#
CONFIG_PERFCTR=y
# CONFIG_PERFCTR_INIT_TESTS is not set
CONFIG_PERFCTR_VIRTUAL=y
CONFIG_PERFCTR_INTERRUPT_SUPPORT=y
CONFIG_PHYSICAL_START=0x100000
# CONFIG_KEXEC is not set

#
# Power management options (ACPI, APM)
#
CONFIG_PM=y
# CONFIG_PM_DEBUG is not set
# CONFIG_SOFTWARE_SUSPEND is not set

#
# ACPI (Advanced Configuration and Power Interface) Support #
CONFIG_ACPI=y
CONFIG_ACPI_BOOT=y
CONFIG_ACPI_INTERPRETER=y
# CONFIG_ACPI_SLEEP is not set
# CONFIG_ACPI_AC is not set
# CONFIG_ACPI_BATTERY is not set CONFIG_ACPI_BUTTON=y
# CONFIG_ACPI_VIDEO is not set
CONFIG_ACPI_FAN=y
CONFIG_ACPI_PROCESSOR=y
CONFIG_ACPI_THERMAL=y
# CONFIG_ACPI_ASUS is not set
# CONFIG_ACPI_IBM is not set
# CONFIG_ACPI_TOSHIBA is not set CONFIG_ACPI_BLACKLIST_YEAR=0
# CONFIG_ACPI_DEBUG is not set
CONFIG_ACPI_BUS=y
CONFIG_ACPI_EC=y
CONFIG_ACPI_POWER=y
CONFIG_ACPI_PCI=y
CONFIG_ACPI_SYSTEM=y
# CONFIG_X86_PM_TIMER is not set
# CONFIG_ACPI_CONTAINER is not set

#
# APM (Advanced Power Management) BIOS Support
#
CONFIG_APM=y
# CONFIG_APM_IGNORE_USER_SUSPEND is not set
# CONFIG_APM_DO_ENABLE is not set
CONFIG_APM_CPU_IDLE=y
# CONFIG_APM_DISPLAY_BLANK is not set
CONFIG_APM_RTC_IS_GMT=y
# CONFIG_APM_ALLOW_INTS is not set
# CONFIG_APM_REAL_MODE_POWER_OFF is not set

#
# CPU Frequency scaling
#
# CONFIG_CPU_FREQ is not set

#
# Bus options (PCI, PCMCIA, EISA, MCA, ISA)
#
CONFIG_PCI=y
# CONFIG_PCI_GOBIOS is not set
# CONFIG_PCI_GOMMCONFIG is not set
# CONFIG_PCI_GODIRECT is not set
CONFIG_PCI_GOANY=y
CONFIG_PCI_BIOS=y
CONFIG_PCI_DIRECT=y
CONFIG_PCI_MMCONFIG=y
# CONFIG_PCIEPORTBUS is not set
# CONFIG_PCI_MSI is not set
# CONFIG_PCI_LEGACY_PROC is not set
# CONFIG_PCI_NAMES is not set
# CONFIG_PCI_DEBUG is not set
CONFIG_ISA_DMA_API=y
# CONFIG_ISA is not set
# CONFIG_MCA is not set
# CONFIG_SCx200 is not set

#
# PCCARD (PCMCIA/CardBus) support
#
# CONFIG_PCCARD is not set

#
# PCI Hotplug Support
#
# CONFIG_HOTPLUG_PCI is not set

#
# Executable file formats
#
CONFIG_BINFMT_ELF=y
# CONFIG_BINFMT_AOUT is not set
CONFIG_BINFMT_MISC=y

#
# Device Drivers
#

#
# Generic Driver Options
#
CONFIG_STANDALONE=y
CONFIG_PREVENT_FIRMWARE_BUILD=y
CONFIG_FW_LOADER=y
# CONFIG_DEBUG_DRIVER is not set

#
# Connector - unified userspace <-> kernelspace linker #
CONFIG_CONNECTOR=y
CONFIG_FORK_CONNECTOR=y

#
# Memory Technology Devices (MTD)
#
# CONFIG_MTD is not set

#
# Parallel port support
#
# CONFIG_PARPORT is not set

#
# Plug and Play support
#
CONFIG_PNP=y
# CONFIG_PNP_DEBUG is not set

#
# Protocols
#
CONFIG_PNPACPI=y

#
# Block devices
#
# CONFIG_BLK_DEV_FD is not set
# CONFIG_BLK_CPQ_DA is not set
# CONFIG_BLK_CPQ_CISS_DA is not set
# CONFIG_BLK_DEV_DAC960 is not set
# CONFIG_BLK_DEV_UMEM is not set
# CONFIG_BLK_DEV_COW_COMMON is not set
CONFIG_BLK_DEV_LOOP=y
# CONFIG_BLK_DEV_CRYPTOLOOP is not set
# CONFIG_BLK_DEV_NBD is not set
# CONFIG_BLK_DEV_SX8 is not set
# CONFIG_BLK_DEV_UB is not set
# CONFIG_BLK_DEV_RAM is not set
CONFIG_BLK_DEV_RAM_COUNT=16
CONFIG_INITRAMFS_SOURCE=""
# CONFIG_LBD is not set
# CONFIG_CDROM_PKTCDVD is not set

#
# IO Schedulers
#
CONFIG_IOSCHED_NOOP=y
# CONFIG_IOSCHED_AS is not set
# CONFIG_IOSCHED_DEADLINE is not set
CONFIG_IOSCHED_CFQ=y
# CONFIG_ATA_OVER_ETH is not set

#
# ATA/ATAPI/MFM/RLL support
#
CONFIG_IDE=y
CONFIG_BLK_DEV_IDE=y

#
# Please see Documentation/ide.txt for help/info on IDE drives #
# CONFIG_BLK_DEV_IDE_SATA is not set
# CONFIG_BLK_DEV_HD_IDE is not set CONFIG_BLK_DEV_IDEDISK=y
CONFIG_IDEDISK_MULTI_MODE=y
CONFIG_BLK_DEV_IDECD=y
# CONFIG_BLK_DEV_IDETAPE is not set
# CONFIG_BLK_DEV_IDEFLOPPY is not set
# CONFIG_BLK_DEV_IDESCSI is not set
# CONFIG_IDE_TASK_IOCTL is not set

#
# IDE chipset support/bugfixes
#
CONFIG_IDE_GENERIC=y
# CONFIG_BLK_DEV_CMD640 is not set
# CONFIG_BLK_DEV_IDEPNP is not set
CONFIG_BLK_DEV_IDEPCI=y
CONFIG_IDEPCI_SHARE_IRQ=y
# CONFIG_BLK_DEV_OFFBOARD is not set
CONFIG_BLK_DEV_GENERIC=y
# CONFIG_BLK_DEV_OPTI621 is not set
# CONFIG_BLK_DEV_RZ1000 is not set
CONFIG_BLK_DEV_IDEDMA_PCI=y
# CONFIG_BLK_DEV_IDEDMA_FORCED is not set
CONFIG_IDEDMA_PCI_AUTO=y
# CONFIG_IDEDMA_ONLYDISK is not set
# CONFIG_BLK_DEV_AEC62XX is not set
# CONFIG_BLK_DEV_ALI15X3 is not set
# CONFIG_BLK_DEV_AMD74XX is not set
# CONFIG_BLK_DEV_ATIIXP is not set
# CONFIG_BLK_DEV_CMD64X is not set
# CONFIG_BLK_DEV_TRIFLEX is not set
# CONFIG_BLK_DEV_CY82C693 is not set
# CONFIG_BLK_DEV_CS5520 is not set
# CONFIG_BLK_DEV_CS5530 is not set
# CONFIG_BLK_DEV_HPT34X is not set
# CONFIG_BLK_DEV_HPT366 is not set
# CONFIG_BLK_DEV_SC1200 is not set
# CONFIG_BLK_DEV_PIIX is not set
# CONFIG_BLK_DEV_NS87415 is not set
# CONFIG_BLK_DEV_PDC202XX_OLD is not set
# CONFIG_BLK_DEV_PDC202XX_NEW is not set
# CONFIG_BLK_DEV_SVWKS is not set
# CONFIG_BLK_DEV_SIIMAGE is not set
# CONFIG_BLK_DEV_SIS5513 is not set
# CONFIG_BLK_DEV_SLC90E66 is not set
# CONFIG_BLK_DEV_TRM290 is not set
CONFIG_BLK_DEV_VIA82CXXX=y
# CONFIG_IDE_ARM is not set
CONFIG_BLK_DEV_IDEDMA=y
# CONFIG_IDEDMA_IVB is not set
CONFIG_IDEDMA_AUTO=y
# CONFIG_BLK_DEV_HD is not set

#
# SCSI device support
#
CONFIG_SCSI=y
# CONFIG_SCSI_PROC_FS is not set

#
# SCSI support type (disk, tape, CD-ROM)
#
CONFIG_BLK_DEV_SD=y
# CONFIG_CHR_DEV_ST is not set
# CONFIG_CHR_DEV_OSST is not set
# CONFIG_BLK_DEV_SR is not set
# CONFIG_CHR_DEV_SG is not set
# CONFIG_CHR_DEV_SCH is not set

#
# Some SCSI devices (e.g. CD jukebox) support multiple LUNs #
# CONFIG_SCSI_MULTI_LUN is not set
# CONFIG_SCSI_CONSTANTS is not set
# CONFIG_SCSI_LOGGING is not set

#
# SCSI Transport Attributes
#
# CONFIG_SCSI_SPI_ATTRS is not set
# CONFIG_SCSI_FC_ATTRS is not set
# CONFIG_SCSI_ISCSI_ATTRS is not set

#
# SCSI low-level drivers
#
# CONFIG_BLK_DEV_3W_XXXX_RAID is not set
# CONFIG_SCSI_3W_9XXX is not set
# CONFIG_SCSI_ARCMSR is not set
# CONFIG_SCSI_ACARD is not set
# CONFIG_SCSI_AACRAID is not set
# CONFIG_SCSI_AIC7XXX is not set
# CONFIG_SCSI_AIC7XXX_OLD is not set
# CONFIG_SCSI_AIC79XX is not set
# CONFIG_SCSI_DPT_I2O is not set
# CONFIG_MEGARAID_NEWGEN is not set
# CONFIG_MEGARAID_LEGACY is not set
# CONFIG_MEGARAID_SAS is not set
# CONFIG_SCSI_SATA is not set
# CONFIG_SCSI_BUSLOGIC is not set
# CONFIG_SCSI_DMX3191D is not set
# CONFIG_SCSI_EATA is not set
# CONFIG_SCSI_FUTURE_DOMAIN is not set
# CONFIG_SCSI_GDTH is not set
# CONFIG_SCSI_IPS is not set
# CONFIG_SCSI_INITIO is not set
# CONFIG_SCSI_INIA100 is not set
# CONFIG_SCSI_SYM53C8XX_2 is not set
# CONFIG_SCSI_IPR is not set
# CONFIG_SCSI_QLOGIC_FC is not set
# CONFIG_SCSI_QLOGIC_1280 is not set
CONFIG_SCSI_QLA2XXX=y
# CONFIG_SCSI_QLA21XX is not set
# CONFIG_SCSI_QLA22XX is not set
# CONFIG_SCSI_QLA2300 is not set
# CONFIG_SCSI_QLA2322 is not set
# CONFIG_SCSI_QLA6312 is not set
# CONFIG_SCSI_LPFC is not set
# CONFIG_SCSI_DC395x is not set
# CONFIG_SCSI_DC390T is not set
# CONFIG_SCSI_NSP32 is not set
# CONFIG_SCSI_DEBUG is not set

#
# Multi-device support (RAID and LVM)
#
# CONFIG_MD is not set

#
# Fusion MPT device support
#
# CONFIG_FUSION is not set
# CONFIG_FUSION_SPI is not set
# CONFIG_FUSION_FC is not set

#
# IEEE 1394 (FireWire) support
#
# CONFIG_IEEE1394 is not set

#
# I2O device support
#
# CONFIG_I2O is not set

#
# Networking support
#
CONFIG_NET=y

#
# Networking options
#
CONFIG_PACKET=y
CONFIG_PACKET_MMAP=y
CONFIG_UNIX=y
# CONFIG_NET_KEY is not set
CONFIG_INET=y
# CONFIG_IP_MULTICAST is not set
# CONFIG_IP_ADVANCED_ROUTER is not set
# CONFIG_IP_PNP is not set
# CONFIG_NET_IPIP is not set
# CONFIG_NET_IPGRE is not set
# CONFIG_ARPD is not set
# CONFIG_SYN_COOKIES is not set
# CONFIG_INET_AH is not set
# CONFIG_INET_ESP is not set
# CONFIG_INET_IPCOMP is not set
# CONFIG_INET_TUNNEL is not set
CONFIG_IP_TCPDIAG=y
# CONFIG_IP_TCPDIAG_IPV6 is not set

#
# TCP congestion control
#
CONFIG_TCP_CONG_BIC=y
CONFIG_TCP_CONG_WESTWOOD=y
# CONFIG_TCP_CONG_HTCP is not set
# CONFIG_TCP_CONG_HSTCP is not set
# CONFIG_TCP_CONG_HYBLA is not set
# CONFIG_TCP_CONG_VEGAS is not set
# CONFIG_TCP_CONG_SCALABLE is not set
# CONFIG_IPV6 is not set
# CONFIG_NETFILTER is not set

#
# SCTP Configuration (EXPERIMENTAL)
#
# CONFIG_IP_SCTP is not set
# CONFIG_ATM is not set
# CONFIG_BRIDGE is not set
# CONFIG_VLAN_8021Q is not set
# CONFIG_DECNET is not set
# CONFIG_LLC2 is not set
# CONFIG_IPX is not set
# CONFIG_ATALK is not set
# CONFIG_X25 is not set
# CONFIG_LAPB is not set
# CONFIG_NET_DIVERT is not set
# CONFIG_ECONET is not set
# CONFIG_WAN_ROUTER is not set

#
# QoS and/or fair queueing
#
# CONFIG_NET_SCHED is not set
# CONFIG_NET_CLS_ROUTE is not set

#
# Network testing
#
# CONFIG_NET_PKTGEN is not set
# CONFIG_KGDBOE is not set
# CONFIG_NETPOLL is not set
# CONFIG_NETPOLL_RX is not set
# CONFIG_NETPOLL_TRAP is not set
# CONFIG_NET_POLL_CONTROLLER is not set
# CONFIG_HAMRADIO is not set
# CONFIG_IRDA is not set
# CONFIG_BT is not set
# CONFIG_IEEE80211 is not set
CONFIG_NETDEVICES=y
# CONFIG_DUMMY is not set
# CONFIG_BONDING is not set
# CONFIG_EQUALIZER is not set
# CONFIG_TUN is not set
# CONFIG_NET_SB1000 is not set

#
# ARCnet devices
#
# CONFIG_ARCNET is not set

#
# Ethernet (10 or 100Mbit)
#
CONFIG_NET_ETHERNET=y
CONFIG_MII=y
# CONFIG_HAPPYMEAL is not set
# CONFIG_SUNGEM is not set
# CONFIG_NET_VENDOR_3COM is not set

#
# Tulip family network device support
#
# CONFIG_NET_TULIP is not set
# CONFIG_HP100 is not set
CONFIG_NET_PCI=y
# CONFIG_PCNET32 is not set
# CONFIG_AMD8111_ETH is not set
# CONFIG_ADAPTEC_STARFIRE is not set
# CONFIG_B44 is not set
# CONFIG_FORCEDETH is not set
# CONFIG_DGRS is not set
# CONFIG_EEPRO100 is not set
# CONFIG_E100 is not set
# CONFIG_FEALNX is not set
# CONFIG_NATSEMI is not set
# CONFIG_NE2K_PCI is not set
# CONFIG_8139CP is not set
CONFIG_8139TOO=y
# CONFIG_8139TOO_PIO is not set
# CONFIG_8139TOO_TUNE_TWISTER is not set
# CONFIG_8139TOO_8129 is not set
# CONFIG_8139_OLD_RX_RESET is not set
# CONFIG_SIS900 is not set
# CONFIG_EPIC100 is not set
# CONFIG_SUNDANCE is not set
# CONFIG_TLAN is not set
# CONFIG_VIA_RHINE is not set

#
# Ethernet (1000 Mbit)
#
# CONFIG_ACENIC is not set
# CONFIG_DL2K is not set
# CONFIG_E1000 is not set
# CONFIG_NS83820 is not set
# CONFIG_HAMACHI is not set
# CONFIG_YELLOWFIN is not set
# CONFIG_R8169 is not set
# CONFIG_SKGE is not set
# CONFIG_SK98LIN is not set
# CONFIG_VIA_VELOCITY is not set
# CONFIG_TIGON3 is not set
# CONFIG_BNX2 is not set

#
# Ethernet (10000 Mbit)
#
# CONFIG_CHELSIO_T1 is not set
# CONFIG_IXGB is not set
# CONFIG_S2IO is not set

#
# Token Ring devices
#
# CONFIG_TR is not set

#
# Wireless LAN (non-hamradio)
#
# CONFIG_NET_RADIO is not set

#
# Wan interfaces
#
# CONFIG_WAN is not set
# CONFIG_FDDI is not set
# CONFIG_HIPPI is not set
# CONFIG_PPP is not set
# CONFIG_SLIP is not set
# CONFIG_NET_FC is not set
# CONFIG_SHAPER is not set
# CONFIG_NETCONSOLE is not set

#
# ISDN subsystem
#
# CONFIG_ISDN is not set

#
# Telephony Support
#
# CONFIG_PHONE is not set

#
# Input device support
#
CONFIG_INPUT=y

#
# Userland interfaces
#
CONFIG_INPUT_MOUSEDEV=y
# CONFIG_INPUT_MOUSEDEV_PSAUX is not set
CONFIG_INPUT_MOUSEDEV_SCREEN_X=1280
CONFIG_INPUT_MOUSEDEV_SCREEN_Y=1024
# CONFIG_INPUT_JOYDEV is not set
# CONFIG_INPUT_TSDEV is not set
CONFIG_INPUT_EVDEV=y
# CONFIG_INPUT_EVBUG is not set

#
# Input Device Drivers
#
CONFIG_INPUT_KEYBOARD=y
CONFIG_KEYBOARD_ATKBD=y
# CONFIG_KEYBOARD_SUNKBD is not set
# CONFIG_KEYBOARD_LKKBD is not set
# CONFIG_KEYBOARD_XTKBD is not set
# CONFIG_KEYBOARD_NEWTON is not set
# CONFIG_INPUT_MOUSE is not set
# CONFIG_INPUT_JOYSTICK is not set
# CONFIG_INPUT_TOUCHSCREEN is not set
# CONFIG_INPUT_MISC is not set

#
# Hardware I/O ports
#
CONFIG_SERIO=y
CONFIG_SERIO_I8042=y
# CONFIG_SERIO_SERPORT is not set
# CONFIG_SERIO_CT82C710 is not set
# CONFIG_SERIO_PCIPS2 is not set
CONFIG_SERIO_LIBPS2=y
# CONFIG_SERIO_RAW is not set
# CONFIG_GAMEPORT is not set

#
# Character devices
#
CONFIG_VT=y
CONFIG_VT_CONSOLE=y
CONFIG_HW_CONSOLE=y
# CONFIG_SERIAL_NONSTANDARD is not set

#
# Serial drivers
#
CONFIG_SERIAL_8250=y
CONFIG_SERIAL_8250_CONSOLE=y
# CONFIG_SERIAL_8250_ACPI is not set
CONFIG_SERIAL_8250_NR_UARTS=4
# CONFIG_SERIAL_8250_EXTENDED is not set

#
# Non-8250 serial port support
#
CONFIG_SERIAL_CORE=y
CONFIG_SERIAL_CORE_CONSOLE=y
# CONFIG_SERIAL_JSM is not set
CONFIG_UNIX98_PTYS=y
# CONFIG_LEGACY_PTYS is not set

#
# IPMI
#
# CONFIG_IPMI_HANDLER is not set

#
# Watchdog Cards
#
# CONFIG_WATCHDOG is not set
# CONFIG_HW_RANDOM is not set
# CONFIG_NVRAM is not set
CONFIG_RTC=y
# CONFIG_DTLK is not set
# CONFIG_R3964 is not set
# CONFIG_APPLICOM is not set
# CONFIG_SONYPI is not set

#
# Ftape, the floppy tape device driver
#
# CONFIG_FTAPE is not set
CONFIG_AGP=y
# CONFIG_AGP_ALI is not set
# CONFIG_AGP_ATI is not set
# CONFIG_AGP_AMD is not set
# CONFIG_AGP_AMD64 is not set
# CONFIG_AGP_INTEL is not set
# CONFIG_AGP_NVIDIA is not set
# CONFIG_AGP_SIS is not set
# CONFIG_AGP_SWORKS is not set
CONFIG_AGP_VIA=y
# CONFIG_AGP_EFFICEON is not set
CONFIG_DRM=y
# CONFIG_DRM_TDFX is not set
# CONFIG_DRM_R128 is not set
CONFIG_DRM_RADEON=y
# CONFIG_DRM_MGA is not set
# CONFIG_DRM_SIS is not set
# CONFIG_DRM_VIA is not set
# CONFIG_MWAVE is not set
# CONFIG_RAW_DRIVER is not set
CONFIG_HPET=y
# CONFIG_HPET_RTC_IRQ is not set
CONFIG_HPET_MMAP=y
# CONFIG_HANGCHECK_TIMER is not set

#
# TPM devices
#
# CONFIG_TCG_TPM is not set

#
# Hardware Monitoring (Sensors) support
#
CONFIG_HWMON=y

#
# I2C support
#
CONFIG_I2C=y
# CONFIG_I2C_CHARDEV is not set

#
# I2C Algorithms
#
CONFIG_I2C_ALGOBIT=y
# CONFIG_I2C_ALGOPCF is not set
# CONFIG_I2C_ALGOPCA is not set

#
# I2C Hardware Bus support
#
# CONFIG_I2C_ALI1535 is not set
# CONFIG_I2C_ALI1563 is not set
# CONFIG_I2C_ALI15X3 is not set
# CONFIG_I2C_AMD756 is not set
# CONFIG_I2C_AMD8111 is not set
# CONFIG_I2C_I801 is not set
# CONFIG_I2C_I810 is not set
# CONFIG_I2C_PIIX4 is not set
# CONFIG_I2C_ISA is not set
# CONFIG_I2C_NFORCE2 is not set
# CONFIG_I2C_PARPORT_LIGHT is not set
# CONFIG_I2C_PROSAVAGE is not set
# CONFIG_I2C_SAVAGE4 is not set
# CONFIG_SCx200_ACB is not set
# CONFIG_I2C_SIS5595 is not set
# CONFIG_I2C_SIS630 is not set
# CONFIG_I2C_SIS96X is not set
# CONFIG_I2C_VIA is not set
CONFIG_I2C_VIAPRO=y
# CONFIG_I2C_VOODOO3 is not set
# CONFIG_I2C_PCA_ISA is not set

#
# Hardware Sensors Chip support
#
CONFIG_I2C_SENSOR=y
# CONFIG_SENSORS_ADM1021 is not set
# CONFIG_SENSORS_ADM1025 is not set
# CONFIG_SENSORS_ADM1026 is not set
# CONFIG_SENSORS_ADM1031 is not set
# CONFIG_SENSORS_ADM9240 is not set
CONFIG_SENSORS_ASB100=y
# CONFIG_SENSORS_ATXP1 is not set
# CONFIG_SENSORS_DS1621 is not set
# CONFIG_SENSORS_FSCHER is not set
# CONFIG_SENSORS_FSCPOS is not set
# CONFIG_SENSORS_GL518SM is not set
# CONFIG_SENSORS_GL520SM is not set
# CONFIG_SENSORS_IT87 is not set
# CONFIG_SENSORS_LM63 is not set
# CONFIG_SENSORS_LM75 is not set
# CONFIG_SENSORS_LM77 is not set
# CONFIG_SENSORS_LM78 is not set
# CONFIG_SENSORS_LM80 is not set
# CONFIG_SENSORS_LM83 is not set
# CONFIG_SENSORS_LM85 is not set
# CONFIG_SENSORS_LM87 is not set
# CONFIG_SENSORS_LM90 is not set
# CONFIG_SENSORS_LM92 is not set
# CONFIG_SENSORS_MAX1619 is not set
# CONFIG_SENSORS_PC87360 is not set
# CONFIG_SENSORS_SMSC47B397 is not set
# CONFIG_SENSORS_SIS5595 is not set
# CONFIG_SENSORS_SMSC47M1 is not set
# CONFIG_SENSORS_VIA686A is not set
# CONFIG_SENSORS_W83781D is not set
# CONFIG_SENSORS_W83L785TS is not set
# CONFIG_SENSORS_W83627HF is not set
# CONFIG_SENSORS_W83627EHF is not set

#
# Other I2C Chip support
#
# CONFIG_SENSORS_DS1337 is not set
# CONFIG_SENSORS_EEPROM is not set
# CONFIG_SENSORS_PCF8574 is not set
# CONFIG_SENSORS_PCF8591 is not set
# CONFIG_SENSORS_RTC8564 is not set
# CONFIG_I2C_DEBUG_CORE is not set
# CONFIG_I2C_DEBUG_ALGO is not set
# CONFIG_I2C_DEBUG_BUS is not set
# CONFIG_I2C_DEBUG_CHIP is not set

#
# Dallas's 1-wire bus
#
# CONFIG_W1 is not set

#
# Misc devices
#
# CONFIG_IBM_ASM is not set

#
# Multimedia devices
#
# CONFIG_VIDEO_DEV is not set

#
# Digital Video Broadcasting Devices
#
# CONFIG_DVB is not set

#
# Graphics support
#
CONFIG_FB=y
CONFIG_FB_CFB_FILLRECT=y
CONFIG_FB_CFB_COPYAREA=y
CONFIG_FB_CFB_IMAGEBLIT=y
CONFIG_FB_SOFT_CURSOR=y
# CONFIG_FB_MACMODES is not set
CONFIG_FB_MODE_HELPERS=y
# CONFIG_FB_TILEBLITTING is not set
# CONFIG_FB_CIRRUS is not set
# CONFIG_FB_PM2 is not set
# CONFIG_FB_CYBER2000 is not set
# CONFIG_FB_ARC is not set
# CONFIG_FB_ASILIANT is not set
# CONFIG_FB_IMSTT is not set
# CONFIG_FB_VGA16 is not set
# CONFIG_FB_VESA is not set
# CONFIG_VIDEO_SELECT is not set
# CONFIG_FB_HGA is not set
# CONFIG_FB_NVIDIA is not set
# CONFIG_FB_RIVA is not set
# CONFIG_FB_I810 is not set
# CONFIG_FB_INTEL is not set
# CONFIG_FB_MATROX is not set
# CONFIG_FB_RADEON_OLD is not set
CONFIG_FB_RADEON=y
CONFIG_FB_RADEON_I2C=y
# CONFIG_FB_RADEON_DEBUG is not set
# CONFIG_FB_ATY128 is not set
# CONFIG_FB_ATY is not set
# CONFIG_FB_SAVAGE is not set
# CONFIG_FB_SIS is not set
# CONFIG_FB_NEOMAGIC is not set
# CONFIG_FB_KYRO is not set
# CONFIG_FB_3DFX is not set
# CONFIG_FB_VOODOO1 is not set
# CONFIG_FB_TRIDENT is not set
# CONFIG_FB_GEODE is not set
# CONFIG_FB_S1D13XXX is not set
# CONFIG_FB_VIRTUAL is not set

#
# Console display driver support
#
CONFIG_VGA_CONSOLE=y
CONFIG_DUMMY_CONSOLE=y
CONFIG_FRAMEBUFFER_CONSOLE=y
CONFIG_FONTS=y
# CONFIG_FONT_8x8 is not set
CONFIG_FONT_8x16=y
# CONFIG_FONT_6x11 is not set
# CONFIG_FONT_PEARL_8x8 is not set
# CONFIG_FONT_ACORN_8x8 is not set
# CONFIG_FONT_MINI_4x6 is not set
# CONFIG_FONT_SUN8x16 is not set
# CONFIG_FONT_SUN12x22 is not set

#
# Logo configuration
#
# CONFIG_LOGO is not set
# CONFIG_BACKLIGHT_LCD_SUPPORT is not set

#
# Sound
#
CONFIG_SOUND=y

#
# Advanced Linux Sound Architecture
#
CONFIG_SND=y
CONFIG_SND_TIMER=y
CONFIG_SND_PCM=y
CONFIG_SND_HWDEP=y
CONFIG_SND_RAWMIDI=y
CONFIG_SND_SEQUENCER=y
# CONFIG_SND_SEQ_DUMMY is not set
CONFIG_SND_OSSEMUL=y
CONFIG_SND_MIXER_OSS=y
CONFIG_SND_PCM_OSS=y
CONFIG_SND_SEQUENCER_OSS=y
CONFIG_SND_RTCTIMER=y
# CONFIG_SND_VERBOSE_PRINTK is not set
# CONFIG_SND_DEBUG is not set

#
# Generic devices
#
CONFIG_SND_MPU401_UART=y
CONFIG_SND_OPL3_LIB=y
# CONFIG_SND_DUMMY is not set
# CONFIG_SND_VIRMIDI is not set
# CONFIG_SND_MTPAV is not set
# CONFIG_SND_SERIAL_U16550 is not set
# CONFIG_SND_MPU401 is not set

#
# PCI devices
#
# CONFIG_SND_ALI5451 is not set
# CONFIG_SND_ATIIXP is not set
# CONFIG_SND_ATIIXP_MODEM is not set
# CONFIG_SND_AU8810 is not set
# CONFIG_SND_AU8820 is not set
# CONFIG_SND_AU8830 is not set
# CONFIG_SND_AZT3328 is not set
# CONFIG_SND_BT87X is not set
# CONFIG_SND_CS46XX is not set
# CONFIG_SND_CS4281 is not set
# CONFIG_SND_EMU10K1 is not set
# CONFIG_SND_EMU10K1X is not set
# CONFIG_SND_CA0106 is not set
# CONFIG_SND_KORG1212 is not set
# CONFIG_SND_MIXART is not set
# CONFIG_SND_NM256 is not set
# CONFIG_SND_RME32 is not set
# CONFIG_SND_RME96 is not set
# CONFIG_SND_RME9652 is not set
# CONFIG_SND_HDSP is not set
# CONFIG_SND_TRIDENT is not set
# CONFIG_SND_YMFPCI is not set
# CONFIG_SND_ALS4000 is not set
CONFIG_SND_CMIPCI=y
# CONFIG_SND_ENS1370 is not set
# CONFIG_SND_ENS1371 is not set
# CONFIG_SND_ES1938 is not set
# CONFIG_SND_ES1968 is not set
# CONFIG_SND_MAESTRO3 is not set
# CONFIG_SND_FM801 is not set
# CONFIG_SND_ICE1712 is not set
# CONFIG_SND_ICE1724 is not set
# CONFIG_SND_INTEL8X0 is not set
# CONFIG_SND_INTEL8X0M is not set
# CONFIG_SND_SONICVIBES is not set
# CONFIG_SND_VIA82XX is not set
# CONFIG_SND_VIA82XX_MODEM is not set
# CONFIG_SND_VX222 is not set
# CONFIG_SND_HDA_INTEL is not set

#
# USB devices
#
# CONFIG_SND_USB_AUDIO is not set
# CONFIG_SND_USB_USX2Y is not set

#
# Open Sound System
#
# CONFIG_SOUND_PRIME is not set

#
# USB support
#
CONFIG_USB_ARCH_HAS_HCD=y
CONFIG_USB_ARCH_HAS_OHCI=y
CONFIG_USB=y
# CONFIG_USB_DEBUG is not set

#
# Miscellaneous USB options
#
CONFIG_USB_DEVICEFS=y
# CONFIG_USB_BANDWIDTH is not set
# CONFIG_USB_DYNAMIC_MINORS is not set
# CONFIG_USB_SUSPEND is not set
# CONFIG_USB_OTG is not set

#
# USB Host Controller Drivers
#
CONFIG_USB_EHCI_HCD=y
# CONFIG_USB_EHCI_SPLIT_ISO is not set
# CONFIG_USB_EHCI_ROOT_HUB_TT is not set
# CONFIG_USB_ISP116X_HCD is not set
# CONFIG_USB_OHCI_HCD is not set
CONFIG_USB_UHCI_HCD=y
# CONFIG_USB_SL811_HCD is not set

#
# USB Device Class drivers
#
# CONFIG_USB_AUDIO is not set
# CONFIG_USB_BLUETOOTH_TTY is not set
# CONFIG_USB_MIDI is not set
# CONFIG_USB_ACM is not set
# CONFIG_USB_PRINTER is not set

#
# NOTE: USB_STORAGE enables SCSI, and 'SCSI disk support' may also be needed; see USB_STORAGE Help for more information #
CONFIG_USB_STORAGE=y
# CONFIG_USB_STORAGE_DEBUG is not set
# CONFIG_USB_STORAGE_DATAFAB is not set
# CONFIG_USB_STORAGE_FREECOM is not set
# CONFIG_USB_STORAGE_ISD200 is not set
# CONFIG_USB_STORAGE_DPCM is not set
# CONFIG_USB_STORAGE_USBAT is not set
# CONFIG_USB_STORAGE_SDDR09 is not set
# CONFIG_USB_STORAGE_SDDR55 is not set
# CONFIG_USB_STORAGE_JUMPSHOT is not set

#
# USB Input Devices
#
CONFIG_USB_HID=y
CONFIG_USB_HIDINPUT=y
# CONFIG_HID_FF is not set
# CONFIG_USB_HIDDEV is not set
# CONFIG_USB_AIPTEK is not set
# CONFIG_USB_WACOM is not set
# CONFIG_USB_ACECAD is not set
# CONFIG_USB_KBTAB is not set
# CONFIG_USB_POWERMATE is not set
# CONFIG_USB_MTOUCH is not set
# CONFIG_USB_ITMTOUCH is not set
# CONFIG_USB_EGALAX is not set
# CONFIG_USB_XPAD is not set
# CONFIG_USB_ATI_REMOTE is not set

#
# USB Imaging devices
#
# CONFIG_USB_MDC800 is not set
# CONFIG_USB_MICROTEK is not set

#
# USB Multimedia devices
#
# CONFIG_USB_DABUSB is not set

#
# Video4Linux support is needed for USB Multimedia device support #

#
# USB Network Adapters
#
# CONFIG_USB_CATC is not set
# CONFIG_USB_KAWETH is not set
# CONFIG_USB_PEGASUS is not set
# CONFIG_USB_RTL8150 is not set
# CONFIG_USB_USBNET is not set
# CONFIG_USB_MON is not set

#
# USB port drivers
#

#
# USB Serial Converter support
#
# CONFIG_USB_SERIAL is not set

#
# USB Miscellaneous drivers
#
# CONFIG_USB_EMI62 is not set
# CONFIG_USB_EMI26 is not set
# CONFIG_USB_AUERSWALD is not set
# CONFIG_USB_RIO500 is not set
# CONFIG_USB_LEGOTOWER is not set
# CONFIG_USB_LCD is not set
# CONFIG_USB_LED is not set
# CONFIG_USB_CYTHERM is not set
# CONFIG_USB_GOTEMP is not set
# CONFIG_USB_PHIDGETKIT is not set
# CONFIG_USB_PHIDGETSERVO is not set
# CONFIG_USB_IDMOUSE is not set
# CONFIG_USB_SISUSBVGA is not set
# CONFIG_USB_TEST is not set

#
# USB DSL modem support
#

#
# USB Gadget Support
#
# CONFIG_USB_GADGET is not set

#
# MMC/SD Card support
#
# CONFIG_MMC is not set

#
# InfiniBand support
#
# CONFIG_INFINIBAND is not set

#
# SN Devices
#

#
# Distributed Lock Manager
#
# CONFIG_DLM is not set

#
# File systems
#
# CONFIG_EXT2_FS is not set
# CONFIG_EXT3_FS is not set
# CONFIG_JBD is not set
CONFIG_REISER4_FS=y
# CONFIG_REISER4_DEBUG is not set
CONFIG_REISERFS_FS=y
# CONFIG_REISERFS_CHECK is not set
# CONFIG_REISERFS_PROC_INFO is not set
# CONFIG_REISERFS_FS_XATTR is not set
# CONFIG_JFS_FS is not set

#
# XFS support
#
# CONFIG_XFS_FS is not set
# CONFIG_OCFS2_FS is not set
# CONFIG_MINIX_FS is not set
# CONFIG_ROMFS_FS is not set
CONFIG_INOTIFY=y
# CONFIG_QUOTA is not set
CONFIG_DNOTIFY=y
# CONFIG_AUTOFS_FS is not set
# CONFIG_AUTOFS4_FS is not set

#
# Caches
#
# CONFIG_FSCACHE is not set
# CONFIG_FUSE_FS is not set

#
# CD-ROM/DVD Filesystems
#
CONFIG_ISO9660_FS=y
CONFIG_JOLIET=y
# CONFIG_ZISOFS is not set
CONFIG_UDF_FS=y
CONFIG_UDF_NLS=y

#
# DOS/FAT/NT Filesystems
#
CONFIG_FAT_FS=y
CONFIG_MSDOS_FS=y
CONFIG_VFAT_FS=y
CONFIG_FAT_DEFAULT_CODEPAGE=437
CONFIG_FAT_DEFAULT_IOCHARSET="iso8859-1"
# CONFIG_NTFS_FS is not set

#
# Pseudo filesystems
#
CONFIG_PROC_FS=y
CONFIG_PROC_KCORE=y
CONFIG_SYSFS=y
# CONFIG_DEVFS_FS is not set
# CONFIG_DEVPTS_FS_XATTR is not set
CONFIG_TMPFS=y
# CONFIG_TMPFS_XATTR is not set
CONFIG_HUGETLBFS=y
CONFIG_HUGETLB_PAGE=y
CONFIG_RAMFS=y
# CONFIG_CONFIGFS_FS is not set
# CONFIG_RELAYFS_FS is not set

#
# Miscellaneous filesystems
#
# CONFIG_ADFS_FS is not set
# CONFIG_AFFS_FS is not set
# CONFIG_HFS_FS is not set
# CONFIG_HFSPLUS_FS is not set
# CONFIG_BEFS_FS is not set
# CONFIG_BFS_FS is not set
# CONFIG_EFS_FS is not set
# CONFIG_CRAMFS is not set
# CONFIG_VXFS_FS is not set
# CONFIG_HPFS_FS is not set
# CONFIG_QNX4FS_FS is not set
# CONFIG_SYSV_FS is not set
# CONFIG_UFS_FS is not set

#
# Network File Systems
#
# CONFIG_NFS_FS is not set
# CONFIG_NFSD is not set
# CONFIG_SMB_FS is not set
CONFIG_CIFS=y
# CONFIG_CIFS_STATS is not set
# CONFIG_CIFS_XATTR is not set
# CONFIG_CIFS_EXPERIMENTAL is not set
# CONFIG_NCP_FS is not set
# CONFIG_CODA_FS is not set
# CONFIG_AFS_FS is not set
# CONFIG_9P_FS is not set

#
# Partition Types
#
# CONFIG_PARTITION_ADVANCED is not set
CONFIG_MSDOS_PARTITION=y

#
# Native Language Support
#
CONFIG_NLS=y
CONFIG_NLS_DEFAULT="iso8859-1"
CONFIG_NLS_CODEPAGE_437=y
# CONFIG_NLS_CODEPAGE_737 is not set
# CONFIG_NLS_CODEPAGE_775 is not set
# CONFIG_NLS_CODEPAGE_850 is not set
# CONFIG_NLS_CODEPAGE_852 is not set
# CONFIG_NLS_CODEPAGE_855 is not set
# CONFIG_NLS_CODEPAGE_857 is not set
# CONFIG_NLS_CODEPAGE_860 is not set
# CONFIG_NLS_CODEPAGE_861 is not set
# CONFIG_NLS_CODEPAGE_862 is not set
# CONFIG_NLS_CODEPAGE_863 is not set
# CONFIG_NLS_CODEPAGE_864 is not set
# CONFIG_NLS_CODEPAGE_865 is not set
# CONFIG_NLS_CODEPAGE_866 is not set
# CONFIG_NLS_CODEPAGE_869 is not set
# CONFIG_NLS_CODEPAGE_936 is not set
# CONFIG_NLS_CODEPAGE_950 is not set
# CONFIG_NLS_CODEPAGE_932 is not set
# CONFIG_NLS_CODEPAGE_949 is not set
# CONFIG_NLS_CODEPAGE_874 is not set
# CONFIG_NLS_ISO8859_8 is not set
# CONFIG_NLS_CODEPAGE_1250 is not set
# CONFIG_NLS_CODEPAGE_1251 is not set
# CONFIG_NLS_ASCII is not set
CONFIG_NLS_ISO8859_1=y
# CONFIG_NLS_ISO8859_2 is not set
# CONFIG_NLS_ISO8859_3 is not set
# CONFIG_NLS_ISO8859_4 is not set
# CONFIG_NLS_ISO8859_5 is not set
# CONFIG_NLS_ISO8859_6 is not set
# CONFIG_NLS_ISO8859_7 is not set
# CONFIG_NLS_ISO8859_9 is not set
# CONFIG_NLS_ISO8859_13 is not set
# CONFIG_NLS_ISO8859_14 is not set
# CONFIG_NLS_ISO8859_15 is not set
# CONFIG_NLS_KOI8_R is not set
# CONFIG_NLS_KOI8_U is not set
CONFIG_NLS_UTF8=y

#
# Profiling support
#
# CONFIG_PROFILING is not set

#
# Kernel hacking
#
# CONFIG_PRINTK_TIME is not set
CONFIG_DEBUG_KERNEL=y
CONFIG_MAGIC_SYSRQ=y
CONFIG_LOG_BUF_SHIFT=14
CONFIG_DETECT_SOFTLOCKUP=y
# CONFIG_SCHEDSTATS is not set
CONFIG_DEBUG_SLAB=y
CONFIG_DEBUG_PREEMPT=y
# CONFIG_DEBUG_SPINLOCK is not set
# CONFIG_DEBUG_SPINLOCK_SLEEP is not set
# CONFIG_DEBUG_KOBJECT is not set
CONFIG_DEBUG_BUGVERBOSE=y
CONFIG_DEBUG_INFO=y
# CONFIG_PAGE_OWNER is not set
# CONFIG_DEBUG_FS is not set
# CONFIG_FRAME_POINTER is not set
CONFIG_EARLY_PRINTK=y
CONFIG_DEBUG_STACKOVERFLOW=y
# CONFIG_KPROBES is not set
# CONFIG_DEBUG_STACK_USAGE is not set
# CONFIG_DEBUG_PAGEALLOC is not set
# CONFIG_4KSTACKS is not set
CONFIG_X86_FIND_SMP_CONFIG=y
CONFIG_X86_MPPARSE=y
# CONFIG_KGDB is not set

#
# Security options
#
# CONFIG_KEYS is not set
# CONFIG_SECURITY is not set

#
# Cryptographic options
#
# CONFIG_CRYPTO is not set

#
# Hardware crypto devices
#

#
# Library routines
#
# CONFIG_CRC_CCITT is not set
CONFIG_CRC32=y
# CONFIG_LIBCRC32C is not set
CONFIG_GENERIC_HARDIRQS=y
CONFIG_GENERIC_IRQ_PROBE=y
CONFIG_X86_BIOS_REBOOT=y
CONFIG_PC=y

#22 lore raw

Re: BUG in i2c_detach_client

Hi Andrew,

Quoted 13 lines

2.6.12-rc5-mm1 didn't crash.

kernel BUG at include/linux/list.h:166!
invalid operand: 0000 [#1]
PREEMPT

CPU:    0
EIP:    0060:[<c0319cd4>]    Not tainted VLI
EFLAGS: 00010a83   (2.6.12-rc6-mm1)

EIP is at i2c_detach_client+0xb4/0x110
eax: dfc0bcc0 ebx: c15fc26c ecx: c15fc264 edx: c04378d0
esi: c15fc14c edi: c0437720 ebp: 00000000 esp: dff81f10
ds: 007b es: 007b ss: 0068
Process swapper (pid: 1, threadinfo=dff80000 task=c14dca00)

Quoted 10 lines
Stack: dfff6110 dfc0bdb4 00000286 00000286 c15fc26c c15fc14c c15fc160
ffffffed
       c031d512 c15fc160 c03edac1 c15fc26c 00000000 0000002d 00000001
       0000002d c0437720 00000000 c0437c5c 00000001 00000000 c031b100
       00000000 00000000
Call Trace:
 [<c031d512>] asb100_detect+0x442/0x520
 [<c031b100>] i2c_detect+0x240/0x380
 [<c031d0d0>] asb100_detect+0x0/0x520
 [<c0319889>] i2c_add_driver+0x89/0xc0

I suspect you didn't "make oldconfig" before compiling 2.6.12-rc6-mm1. You should have CONFIG_HWMON=Y in .config, and I don't see it. Note that I can't explain why it results in the BUG right above, but it must be related.

If "make oldconfig" doesn't help, try reverting:
http://www.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.12-rc6/2.6.12-rc6-mm1/broken-out/gregkh-i2c-hwmon-03.patch

Thanks,

Signature · 1 line
Jean Delvare
#23 lore raw

Re: BUG in i2c_detach_client

In reply to Andrew James Wade
Quoted 10 lines · Andrew James Wade

2.6.12-rc5-mm1 didn't crash.

kernel BUG at include/linux/list.h:166!
invalid operand: 0000 [#1]
PREEMPT
CPU: 0
EIP: 0060:[<c0319cd4>] Not tainted VLI
EFLAGS: 00010a83 (2.6.12-rc6-mm1)
EIP is at i2c_detach_client+0xb4/0x110

Quoted 9 lines
 eax: dfc0bcc0   ebx: c15fc26c   ecx: c15fc264   edx: c04378d0
 esi: c15fc14c   edi: c0437720   ebp: 00000000   esp: dff81f10
 ds: 007b   es: 007b   ss: 0068
 Process swapper (pid: 1, threadinfo=dff80000 task=c14dca00)
 Stack: dfff6110 dfc0bdb4 00000286 00000286 c15fc26c c15fc14c c15fc160 ffffffed
        c031d512 c15fc160 c03edac1 c15fc26c 00000000 0000002d 00000001 0000002d
        c0437720 00000000 c0437c5c 00000001 00000000 c031b100 00000000 00000000
 Call Trace:
  [<c031d512>] asb100_detect+0x442/0x520

Were there no interesting printks before this BUG hit?

It's due to the kernel running list_del() on a list_head which isn't on a list.

Seems there is an error-path bug in that driver, but I don' thtink the fix will fix it. Please test?

From: Andrew Morton <[email protected]>

Fix error backing-out code in asb100.c

---

 drivers/i2c/chips/asb100.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)
drivers/i2c/chips/asb100.c renamed from drivers/i2c/chips/asb100.c~asb100-fix +4 -2
diff -puN drivers/i2c/chips/asb100.c~asb100-fix drivers/i2c/chips/asb100.c
@@ -690,18 +690,20 @@ static int asb100_detect_subclients(stru
 	if ((err = i2c_attach_client(data->lm75[0]))) {
 		dev_err(&new_client->dev, "subclient %d registration "
 			"at address 0x%x failed.\n", i, data->lm75[0]->addr);
-		goto ERROR_SC_2;
+		goto ERROR_SC_3;
 	}
 
 	if ((err = i2c_attach_client(data->lm75[1]))) {
 		dev_err(&new_client->dev, "subclient %d registration "
 			"at address 0x%x failed.\n", i, data->lm75[1]->addr);
-		goto ERROR_SC_3;
+		goto ERROR_SC_4;
 	}
 
 	return 0;
 
 /* Undo inits in case of errors */
+ERROR_SC_4:
+	i2c_detach_client(data->lm75[1]);
 ERROR_SC_3:
 	i2c_detach_client(data->lm75[0]);
 ERROR_SC_2:

_

#24 lore raw

Re: BUG in i2c_detach_client

Quoted 1 line · Andrew Morton

Were there no interesting printks before this BUG hit?

Nope :-(

Quoted 4 lines

It's due to the kernel running list_del() on a list_head which isn't on a list.

Seems there is an error-path bug in that driver, but I don' thtink the fix will fix it. Please test?

Will do. But I don't think that's it. I've been adding printks to determine the execution path and it goes through the ERROR3 path in asb100_detect(), which means AFACT that the error path in asb100_detect_subclients() isn't taken:

ERROR3:

        i2c_detach_client(data->lm75[0]);
        kfree(data->lm75[1]);
        kfree(data->lm75[0]);
ERROR2:
        i2c_detach_client(new_client); // <--- BUG() in here.
ERROR1:
        kfree(data);
ERROR0:
        return err;

But the ERROR2 path does work despite the location of the bug. If I apply:

drivers/i2c/chips/asb100.c 2005-06-08 17:59:21.461819500 -0400 renamed from drivers/i2c/chips/asb100.c 2005-06-08 17:46:02.123864000 -0400 +1 -1
@@ -811,6 +811,7 @@ static int asb100_detect(struct i2c_adap
        if ((err = i2c_attach_client(new_client)))
                goto ERROR1;
 
+        goto ERROR2;
        /* Attach secondary lm75 clients */
        if ((err = asb100_detect_subclients(adapter, address, kind,
                        new_client)))
@@ -874,7 +875,6 @@ static int asb100_detach_client(struct i
 {
        int err;
 
-       hwmon_device_unregister(client->class_dev);
 
        if ((err = i2c_detach_client(client))) {
                dev_err(&client->dev, "client deregistration failed; "

No bug(). But the ERROR3 path doesn't:

drivers/i2c/chips/asb100.c 2005-06-08 17:58:15.749712750 -0400 renamed from drivers/i2c/chips/asb100.c 2005-06-08 17:46:02.123864000 -0400 +1 -1
@@ -815,6 +815,7 @@ static int asb100_detect(struct i2c_adap
        if ((err = asb100_detect_subclients(adapter, address, kind,
                        new_client)))
                goto ERROR2;
+        goto ERROR3;
 
        /* Initialize the chip */
        asb100_init_client(new_client);
@@ -874,7 +875,6 @@ static int asb100_detach_client(struct i
 {
        int err;
 
-       hwmon_device_unregister(client->class_dev);
 
        if ((err = i2c_detach_client(client))) {
                dev_err(&client->dev, "client deregistration failed; "

causes a BUG(). I've yet to track the problem down further. Unfortunately I have no more time today, I'll play with it again tomorrow.

Regards,
Andrew

#25 lore raw

Re: BUG in i2c_detach_client

Quoted 14 lines · Andrew James Wade
Quoted 1 line · Andrew Morton

Were there no interesting printks before this BUG hit?

Nope :-(

Quoted 4 lines

It's due to the kernel running list_del() on a list_head which isn't on a list.

Seems there is an error-path bug in that driver, but I don' thtink the fix will fix it. Please test?

Will do. But I don't think that's it. I've been adding printks to determine the execution path and it goes through the ERROR3 path in asb100_detect(), which means AFACT that the error path in asb100_detect_subclients() isn't taken:

ERROR3:

Quoted 9 lines
         i2c_detach_client(data->lm75[0]);
         kfree(data->lm75[1]);
         kfree(data->lm75[0]);
 ERROR2:
         i2c_detach_client(new_client); // <--- BUG() in here.
 ERROR1:
         kfree(data);
 ERROR0:
         return err;

hm, the tree I have here doesn't do that. What kernel do you have there?

I suggest you work against
http://www.zip.com.au/~akpm/linux/patches/stuff/x.bz2 which is a patch against 2.6.12-rc6 containing everybody's latest everything.

#26 lore raw

Re: BUG in i2c_detach_client

Hi Andrew,

Quoted 16 lines
Quoted 6 lines

Will do. But I don't think that's it. I've been adding printks to determine the execution path and it goes through the ERROR3 path in asb100_detect(), which means AFACT that the error path in asb100_detect_subclients() isn't taken:

ERROR3:

Quoted 9 lines
         i2c_detach_client(data->lm75[0]);
         kfree(data->lm75[1]);
         kfree(data->lm75[0]);
 ERROR2:
         i2c_detach_client(new_client); // <--- BUG() in here.
 ERROR1:
         kfree(data);
 ERROR0:
         return err;
Quoted 1 line

hm, the tree I have here doesn't do that. What kernel do you have there?

I suspect that the bug will only show when the i2c-core and asb100 drivers (and the relevant i2c bus driver) are built into the kernel. (See my previous post.)

Thanks,
--
Jean Delvare

#27 lore raw

Re: BUG in i2c_detach_client

In reply to Andrew Morton

Hi Andrew, Andrew, all,

[Adding Mark M. Hoffman in the loop, as the author and recent modifier of the asb100 driver.]

Quoted 22 lines

From: Andrew Morton <[email protected]>

Fix error backing-out code in asb100.c

(...)

drivers/i2c/chips/asb100.c renamed from drivers/i2c/chips/asb100.c~asb100-fix +2 -2
@@ -690,18 +690,20 @@ static int asb100_detect_subclients(stru
 	if ((err = i2c_attach_client(data->lm75[0]))) {
 		dev_err(&new_client->dev, "subclient %d registration "
 			"at address 0x%x failed.\n", i, data->lm75[0]->addr);
-		goto ERROR_SC_2;
+		goto ERROR_SC_3;
 	}
 
 	if ((err = i2c_attach_client(data->lm75[1]))) {
 		dev_err(&new_client->dev, "subclient %d registration "
 			"at address 0x%x failed.\n", i, data->lm75[1]->addr);
-		goto ERROR_SC_3;
+		goto ERROR_SC_4;

drivers/i2c/chips/asb100.c static int asb100_detect_subclients(stru · line 709

Quoted 10 lines
drivers/i2c/chips/asb100.c renamed from drivers/i2c/chips/asb100.c~asb100-fix +2 -0
 	}
 
 	return 0;
 
 /* Undo inits in case of errors */
+ERROR_SC_4:
+	i2c_detach_client(data->lm75[1]);
 ERROR_SC_3:
 	i2c_detach_client(data->lm75[0]);
 ERROR_SC_2:

This patch looks broken to me, please discard it. You do not want to call i2c_detach_client when the corresponding i2c_attach_client failed. The original code was fine in that respect. I don't think there is any problem in the asb100_detect_subclients() function.

I do however think that there is a problem in the asb100_detect() function, where a call to i2c_detach client() is missing:

ERROR3:

	i2c_detach_client(data->lm75[1]); <-- HERE
	i2c_detach_client(data->lm75[0]);
	kfree(data->lm75[1]);
	kfree(data->lm75[0]);

If we take that error path, it means that both subclients have been successfully attached, thus need proper detach.

The reason why the bug triggered on Andrew (James Wade) is probably that hwmon_device_register() failed, due to an order problem in a Makefile. See http://lkml.org/lkml/2005/6/8/338, which has an explanation and a patch fixing it (I think).

This still doesn't explain why the error path triggers the BUG(), and although applying the aforementioned patch will probably get the driver working, I'd really like to understand what's going on there.

Thanks,
--
Jean Delvare

#28 lore raw

Re: BUG in i2c_detach_client

Quoted 4 lines · Jean Delvare

The reason why the bug triggered on Andrew (James Wade) is probably that hwmon_device_register() failed, due to an order problem in a Makefile. See http://lkml.org/lkml/2005/6/8/338, which has an explanation and a patch fixing it (I think).

Yup, the kernel now boots.

Quoted 3 lines

This still doesn't explain why the error path triggers the BUG(), and although applying the aforementioned patch will probably get the driver working, I'd really like to understand what's going on there.

Ok, I'll keep playing around with the kernel to see what I can find out.

(and I'll take a look at
http://www.zip.com.au/~akpm/linux/patches/stuff/x.bz2 as Andrew Morton suggested)

Thanks,
Andrew

#29 lore raw

Re: BUG in i2c_detach_client

In reply to Jean Delvare

Mystery solved.

ERROR3:

	i2c_detach_client(data->lm75[1]); <-- HERE
	i2c_detach_client(data->lm75[0]);
	kfree(data->lm75[1]);
	kfree(data->lm75[0]);

The missing i2c_detach_client call meant that data->lm75[1] was still on the list of i2c devices when it was freed. This was corrupting the list. The ERROR3 path now works on my kernel.

Thanks for your help.
Andrew

#30 lore raw

Re: BUG in i2c_detach_client

Hi Andrew,

Quoted 11 lines

Mystery solved.

ERROR3:

	i2c_detach_client(data->lm75[1]); <-- HERE
	i2c_detach_client(data->lm75[0]);
	kfree(data->lm75[1]);
	kfree(data->lm75[0]);

The missing i2c_detach_client call meant that data->lm75[1] was still on the list of i2c devices when it was freed. This was corrupting the list. The ERROR3 path now works on my kernel.

Oh my, I had it right under my nose and didn't see it ;) Thanks for the clarification.

Greg, please apply the following patch on top of the hwmon patches until Mark submits an updated version of the whole thing.

----------------------------------

Fix a broken error path in the asb100 driver.

drivers/i2c/chips/asb100.c renamed from drivers/i2c/chips/asb100.c.orig +1 -0
@@ -859,6 +859,7 @@
 	return 0;
 
 ERROR3:
+	i2c_detach_client(data->lm75[1]);
 	i2c_detach_client(data->lm75[0]);
 	kfree(data->lm75[1]);
 	kfree(data->lm75[0]);
Signature · 1 line
Jean Delvare
#31 lore raw

Re: BUG in i2c_detach_client

Quoted 29 lines · Jean Delvare

Hi Andrew,

Quoted 11 lines

Mystery solved.

ERROR3:

	i2c_detach_client(data->lm75[1]); <-- HERE
	i2c_detach_client(data->lm75[0]);
	kfree(data->lm75[1]);
	kfree(data->lm75[0]);

The missing i2c_detach_client call meant that data->lm75[1] was still on the list of i2c devices when it was freed. This was corrupting the list. The ERROR3 path now works on my kernel.

Oh my, I had it right under my nose and didn't see it ;) Thanks for the clarification.

Greg, please apply the following patch on top of the hwmon patches until Mark submits an updated version of the whole thing.

----------------------------------

Fix a broken error path in the asb100 driver.

drivers/i2c/chips/asb100.c line 865

Quoted 7 lines
drivers/i2c/chips/asb100.c renamed from drivers/i2c/chips/asb100.c.orig +1 -0
@@ -859,6 +859,7 @@
 	return 0;
 
 ERROR3:
+	i2c_detach_client(data->lm75[1]);
 	i2c_detach_client(data->lm75[0]);
 	kfree(data->lm75[1]);
 	kfree(data->lm75[0]);

Hm, what tree is this against? Am I missing some inbetween patch here?

thanks,

greg k-h

#32 lore raw

Re: BUG in i2c_detach_client

Hi Greg,

Quoted 5 lines
Quoted 5 lines
drivers/i2c/chips/asb100.c renamed from drivers/i2c/chips/asb100.c.orig +0 -0
@@ -859,6 +859,7 @@
 	return 0;
 
Quoted 7 lines

drivers/i2c/chips/asb100.c line 865

Quoted 5 lines
drivers/i2c/chips/asb100.c renamed from drivers/i2c/chips/asb100.c.orig +1 -0
 ERROR3:
+	i2c_detach_client(data->lm75[1]);
 	i2c_detach_client(data->lm75[0]);
 	kfree(data->lm75[1]);
 	kfree(data->lm75[0]);

Hm, what tree is this against? Am I missing some inbetween patch here?

2.6.12-rc6-mm1, but that was a fix to Mark's hwmon patches, which you just backed out from your tree - so this fix is no more needed (and should unsurprisingly fail to apply).

Thanks,
--
Jean Delvare

#33 lore raw
In reply to Andrew Morton
Quoted 9 lines · Andrew Morton

ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.12-rc6/2.6.12-rc6-mm1/

- Added v9fs

- Various random fixes

- Probably a similar number of breakages

I just had the following Oopses:

Unable to handle kernel paging request at virtual address 901a1960
printing eip:
c0139251
*pde = 00000000
Oops: 0002 [#1]
Modules linked in: radeon drm tun snd_seq snd_pcm_oss snd_mixer_oss

snd_via82xx snd_ac97_codec snd_pcm snd_timer snd_page_alloc snd_mpu401_uart snd_rawmidi snd_seq_device snd soundcore ipt_multiport ipt_state ipt_limit ipt_MASQUERADE ipt_mark iptable_mangle ipt_MARK ipt_REJECT iptable_filter iptable_nat ip_tables ip_conntrack_irc ip_conntrack_ftp ip_conntrack skge 8139too mii usbcore ide_cd cdrom

CPU:    0
EIP:    0060:[<c0139251>]    Not tainted VLI
EFLAGS: 00010086   (2.6.12-rc6-mm1-arakou) 

EIP is at find_lock_page+0x21/0xb0
eax: 901a195c ebx: 901a195c ecx: d8a3b094 edx: 00000003
esi: 00109380 edi: c18e4b08 ebp: d822cb10 esp: d822cb00
ds: 007b es: 007b ss: 0068
Process emerge (pid: 31977, threadinfo=d822c000 task=cbb9d040)

Stack: c18e4b04 c1218060 00000000 00000050 d822cb34 c013930e 00000050 00109380 
        c18e4b04 c0333d04 00109380 c18e4a00 00001000 d822cb50 c0157986 d822cb50
 00109380 00109380 00001000 c18e4a00 d822cb70 c0157af5 00001000 d822cb70
Call Trace:
[<c0103d17>] show_stack+0x97/0xd0 
[<c0103ec5>] show_registers+0x155/0x1f0
[<c01040c1>] die+0xc1/0x140 
[<c01157ec>] do_page_fault+0x23c/0x6b5 
[<c010395f>] error_code+0x4f/0x54
[<c013930e>] find_or_create_page+0x2e/0xd0
[<c0157986>] grow_dev_page+0x26/0x110
[<c0157af5>] __getblk_slow+0x85/0x130
[<c0157e8b>] __getblk+0x3b/0x50
[<c01a788b>] search_by_key+0x9b/0xf40
[<c0195095>] reiserfs_read_locked_inode+0x65/0x110
[<c01951e9>] reiserfs_iget+0x79/0xa0
[<c0190330>] reiserfs_lookup+0xd0/0x130
[<c0161f80>] real_lookup+0xb0/0xd0
[<c01622be>] do_lookup+0x7e/0x90
[<c0162a06>] __link_path_walk+0x736/0xd50
[<c016306a>] link_path_walk+0x4a/0x110
[<c01633b4>] path_lookup+0x74/0x120
[<c01635ee>] __user_walk+0x2e/0x50
[<c015e240>] vfs_stat+0x20/0x50
[<c015e834>] sys_stat64+0x14/0x30
[<c0102e0f>] sysenter_past_esp+0x54/0x75
Code: c3 89 f6 8d bc 27 00 00 00 00 55 89 e5 57 56 89 d6 53 83 ec 04

89 45 f0 fa 8d 78 04 89 f2 89 f8 e8 35 04 0b 00 85 c0 89 c3 74 56 <ff> 40 04 0f ba 28 00 19 c0 85 c0 74 49 fb 0f ba 2b 00 19 c0 85

<1>Unable to handle kernel paging request at virtual address 71ef2710 printing eip:
c0157140
*pde = 00000000

Oops: 0000 [#2]
Modules linked in: radeon drm tun snd_seq snd_pcm_oss snd_mixer_oss

snd_via82xx snd_ac97_codec snd_pcm snd_timer snd_page_alloc snd_mpu401_uart snd_rawmidi snd_seq_device snd soundcore ipt_multiport ipt_state ipt_limit ipt_MASQUERADE ipt_mark iptable_mangle ipt_MARK ipt_REJECT iptable_filter iptable_nat ip_tables ip_conntrack_irc ip_conntrack_ftp ip_conntrack skge 8139too mii usbcore ide_cd cdrom
CPU: 0

EIP:    0060:[<c0157140>]    Not tainted VLI   
EFLAGS: 00010a16   (2.6.12-rc6-mm1-arakou)     

EIP is at __find_get_block_slow+0x90/0x140
eax: 00000000 ebx: 71ef26fc ecx: cb96f0e7 edx: 00000001
esi: c1309f20 edi: 000f9df5 ebp: e35d5b98 esp: e35d5b74
ds: 007b es: 007b ss: 0068
Process vim (pid: 32081, threadinfo=e35d5000 task=c2cc55b0)

Stack: df7fb6bc f6de8a4c f7cf12fc f6de8cec 00000002 c18e4584 dcb43d7c c18e4520 
       000f9df5 e35d5bac c0157e1c 00001000 000f9df5 c18e4520 e35d5bc0 c0157e6c 
       00003e94 0000003e 000f9df5 e35d5ce0 c01a788b 0000001e 0000001f e35d5bf0 
Call Trace:
 [<c0103d17>] show_stack+0x97/0xd0
 [<c0103ec5>] show_registers+0x155/0x1f0
 [<c01040c1>] die+0xc1/0x140
 [<c01157ec>] do_page_fault+0x23c/0x6b5 
 [<c010395f>] error_code+0x4f/0x54
 [<c0157e1c>] __find_get_block+0x6c/0xa0
 [<c0157e6c>] __getblk+0x1c/0x50
 [<c01a788b>] search_by_key+0x9b/0xf40  
 [<c018fc2c>] search_by_entry_key+0x1c/0x1f0
 [<c01901e0>] reiserfs_find_entry+0x90/0x110
 [<c01902d2>] reiserfs_lookup+0x72/0x130
 [<c0161f80>] real_lookup+0xb0/0xd0
 [<c01622be>] do_lookup+0x7e/0x90
 [<c0162a06>] __link_path_walk+0x736/0xd50
 [<c016306a>] link_path_walk+0x4a/0x110 
 [<c01633b4>] path_lookup+0x74/0x120
 [<c0163a09>] open_namei+0x79/0x5f0
 [<c0154c29>] filp_open+0x29/0x50
 [<c0154fac>] sys_open+0x3c/0xc0
 [<c0102e0f>] sysenter_past_esp+0x54/0x75
Code: 89 f0 e8 34 b8 fe ff 89 d8 83 c4 18 5b 5e 5f c9 c3 8b 06 f6 c4

08 0f 84 a4 00 00 00 8b 5e 0c ba 01 00 00 00 89 d9 90 8d 74 26 00 <3b> 7b 14 74 7b 8b 03 8b 5b 04 a8 10 b8 00 00 00 00 0f 44 d0 39

Bad page state at free_hot_cold_page (in process 'firefox-bin', page c1309360) flags:0x40000000 mapping:00000000 mapcount:-1 count:0

Backtrace:
 [<c0103d67>] dump_stack+0x17/0x20
 [<c013cb52>] bad_page+0x72/0xb0
 [<c013d2da>] free_hot_cold_page+0x4a/0xe0
 [<c013da81>] __pagevec_free+0x31/0x40
 [<c0142a9d>] release_pages+0x9d/0x150
 [<c0142b68>] __pagevec_release+0x18/0x30
 [<c01430bb>] truncate_inode_pages_range+0x13b/0x300
 [<c014329a>] truncate_inode_pages+0x1a/0x20
 [<c016d8e2>] generic_delete_inode+0xb2/0xd0
 [<c016da1f>] generic_drop_inode+0xf/0x20
 [<c016da92>] iput+0x62/0x90
 [<c016494f>] sys_unlink+0xdf/0x110
 [<c0102e0f>] sysenter_past_esp+0x54/0x75

Trying to fix it up, but a reboot is needed

regards,

Benoit Boissinot

#34 lore raw
In reply to Andrew Morton
Quoted 3 lines · Andrew Morton

+git-arm-smp.patch

ARM git trees

The arm pxa255 based Zaurus won't resume from a suspend with the patches from the above tree applied. The suspend looks normal and gets at least as far as pxa_pm_enter(). After that, the device appears to be dead and needs a battery removal to reset. I'm unsure if it actually suspends and is failing to resume or is crashing in the latter suspend stages.

Is there some documentation on what the above patch is aiming to do anywhere?

Richard

#35 lore raw
Quoted 6 lines · Richard Purdie
Quoted 3 lines · Andrew Morton

+git-arm-smp.patch

ARM git trees

Quoted 8 lines

The arm pxa255 based Zaurus won't resume from a suspend with the patches from the above tree applied. The suspend looks normal and gets at least as far as pxa_pm_enter(). After that, the device appears to be dead and needs a battery removal to reset. I'm unsure if it actually suspends and is failing to resume or is crashing in the latter suspend stages.

Is there some documentation on what the above patch is aiming to do anywhere?

Did you apply just that patch, or are you talking about the whole -mm lineup?

If the latter, please test with only git-arm-smp.patch.

#36 lore raw
Quoted 13 lines · Andrew Morton
Quoted 12 lines · Richard Purdie
Quoted 3 lines · Andrew Morton

+git-arm-smp.patch

ARM git trees

The arm pxa255 based Zaurus won't resume from a suspend with the patches from the above tree applied. The suspend looks normal and gets at least as far as pxa_pm_enter(). After that, the device appears to be dead and needs a battery removal to reset. I'm unsure if it actually suspends and is failing to resume or is crashing in the latter suspend stages.

Quoted 6 lines
Quoted 2 lines

Is there some documentation on what the above patch is aiming to do anywhere?

Did you apply just that patch, or are you talking about the whole -mm lineup?

If the latter, please test with only git-arm-smp.patch.

Sorry, I wasn't clear. I had problems with the -mm lineup and tracked it down to the above patch. With the above patch removed, -mm works fine.

(I know there's a number of changes to the arm pxa suspend/resume code in git-arm.patch but they're definitely not causing the problem.)

Richard

#37 lore raw
Quoted 15 lines · Richard Purdie
Quoted 14 lines · Andrew Morton
Quoted 11 lines
Quoted 2 lines

+git-arm-smp.patch
ARM git trees

The arm pxa255 based Zaurus won't resume from a suspend with the patches from the above tree applied. The suspend looks normal and gets at least as far as pxa_pm_enter(). After that, the device appears to be dead and needs a battery removal to reset. I'm unsure if it actually suspends and is failing to resume or is crashing in the latter suspend stages.

Is there some documentation on what the above patch is aiming to do anywhere?

Did you apply just that patch, or are you talking about the whole -mm lineup?

Quoted 7 lines
Quoted 1 line

If the latter, please test with only git-arm-smp.patch.

Sorry, I wasn't clear. I had problems with the -mm lineup and tracked it down to the above patch. With the above patch removed, -mm works fine.

(I know there's a number of changes to the arm pxa suspend/resume code in git-arm.patch but they're definitely not causing the problem.)

I meant to add that git-arm-smp.patch breaks suspend/resume, even applied in isolation against 2.6.12-rc6.

Richard

#38 lore raw
In reply to Richard Purdie
Quoted 10 lines · Richard Purdie
Quoted 3 lines · Andrew Morton

+git-arm-smp.patch

ARM git trees

The arm pxa255 based Zaurus won't resume from a suspend with the patches from the above tree applied. The suspend looks normal and gets at least as far as pxa_pm_enter(). After that, the device appears to be dead and needs a battery removal to reset. I'm unsure if it actually suspends and is failing to resume or is crashing in the latter suspend stages.

<grumble>Well, its a bit late for this since (a) stuff has rapidly moved on at rmk towers since 2.6.12 was released this morning, and
(b) I've just asked Linus to pull this.</grumble>

Thinking about what's probably happening, I suspect all the ARM suspend and resume code needs to be reworked to save more state. I'll try to cook up a patch tomorrow to fix it, but I'll need you to provide feedback.

Please note that you may see other ARM breakage over the next month or so - I'm going to be concentrating on merging ARM SMP support, and whatever bashing other people like yourself can give the kernel will help ensure that problems are picked up quickly.

Signature · 3 lines
Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of:  2.6 Serial core
#39 lore raw
Quoted 12 lines · Russell King
Quoted 10 lines · Richard Purdie
Quoted 3 lines · Andrew Morton

+git-arm-smp.patch

ARM git trees

The arm pxa255 based Zaurus won't resume from a suspend with the patches from the above tree applied. The suspend looks normal and gets at least as far as pxa_pm_enter(). After that, the device appears to be dead and needs a battery removal to reset. I'm unsure if it actually suspends and is failing to resume or is crashing in the latter suspend stages.

Quoted 3 lines

<grumble>Well, its a bit late for this since (a) stuff has rapidly moved on at rmk towers since 2.6.12 was released this morning, and
(b) I've just asked Linus to pull this.</grumble>

Please don't underestimate the time it takes to wade through all the patches in the -mm tree, find the one causing the breakage, investigate the patch and report it to the person concerned. I'm doing the Zaurus work in my spare time and don't get paid for it. Just reflashing and booting a new kernel probably takes ~15mins on the Zaurus. The copy/clearpage problem took a complete weekend to track down (as it was showing up randomly) and then needed further evenings to debug your patch which is a large chunk of my free time. The Checked-By: line didn't quite give the full picture.

I realise its taken me a while to find enough time to test/debug this kernel but as least you now know there's a problem...

Quoted 4 lines

Thinking about what's probably happening, I suspect all the ARM suspend and resume code needs to be reworked to save more state. I'll try to cook up a patch tomorrow to fix it, but I'll need you to provide feedback.

Ok, thanks. I'm happy to test any fixes/patches.

Quoted 4 lines

Please note that you may see other ARM breakage over the next month or so - I'm going to be concentrating on merging ARM SMP support, and whatever bashing other people like yourself can give the kernel will help ensure that problems are picked up quickly.

In order to assist with that, can you publish these patches somewhere? That way, I can apply them against a known good Zaurus kernel tree and know straight away if they break anything (diff/patch format would be preferable as my Zaurus trees are all patch based).

On a positive note, something in the later 2.6.12-rc kernels has made a massive difference to the speed on the Zaurus - I suspect the removal of the preempt locks on copy/clearpage. It boots up ~1.5x faster and the speed gain will make a lot of people very happy :)

Richard

#40 lore raw
Quoted 7 lines · Richard Purdie
Quoted 4 lines · Russell King

Thinking about what's probably happening, I suspect all the ARM suspend and resume code needs to be reworked to save more state. I'll try to cook up a patch tomorrow to fix it, but I'll need you to provide feedback.

Ok, thanks. I'm happy to test any fixes/patches.

This should resolve the problem - we now rely on the stack pointer for each CPU mode to remain constant throughout the running time of the kernel, which includes across suspend/resume cycles.

arch/arm/mach-pxa/sleep.S +21 -0
@@ -38,6 +38,16 @@ ENTRY(pxa_cpu_suspend)
 #endif
 	stmfd	sp!, {r2 - r12, lr}		@ save registers on stack
 
+	@ preserve IRQ, abort and undefined mode stack pointers
+	msr	cpsr_c, #PSR_F_BIT | PSR_I_BIT | IRQ_MODE
+	mov	r4, sp
+	msr	cpsr_c, #PSR_F_BIT | PSR_I_BIT | ABT_MODE
+	mov	r5, sp
+	msr	cpsr_c, #PSR_F_BIT | PSR_I_BIT | UND_MODE
+	mov	r6, sp
+	msr	cpsr_c, #PSR_F_BIT | PSR_I_BIT | SVC_MODE
+	stmfd	sp!, {r4 - r6}
+
 	@ get coprocessor registers
 	mrc	p14, 0, r3, c6, c0, 0		@ clock configuration, for turbo mode
 	mrc	p15, 0, r4, c15, c1, 0		@ CP access reg
@@ -229,6 +239,17 @@ resume_after_mmu:
 #ifdef CONFIG_XSCALE_CACHE_ERRATA
 	bl	cpu_xscale_proc_init
 #endif
+
+	@ restore IRQ, abort and undefined mode stack pointers
+	ldmfd	sp!, {r4 - r6}
+	msr	cpsr_c, #PSR_F_BIT | PSR_I_BIT | IRQ_MODE
+	mov	sp, r4
+	msr	cpsr_c, #PSR_F_BIT | PSR_I_BIT | ABT_MODE
+	mov	sp, r5
+	msr	cpsr_c, #PSR_F_BIT | PSR_I_BIT | UND_MODE
+	mov	sp, r6
+	msr	cpsr_c, #PSR_F_BIT | PSR_I_BIT | SVC_MODE
+
 	ldmfd	sp!, {r2, r3}
 #ifndef CONFIG_IWMMXT
 	mar	acc0, r2, r3
arch/arm/mach-sa1100/sleep.S +21 -0
@@ -37,6 +37,16 @@ ENTRY(sa1100_cpu_suspend)
 
 	stmfd	sp!, {r4 - r12, lr}		@ save registers on stack
 
+	@ preserve IRQ, abort and undefined mode stack pointers
+	msr	cpsr_c, #PSR_F_BIT | PSR_I_BIT | IRQ_MODE
+	mov	r4, sp
+	msr	cpsr_c, #PSR_F_BIT | PSR_I_BIT | ABT_MODE
+	mov	r5, sp
+	msr	cpsr_c, #PSR_F_BIT | PSR_I_BIT | UND_MODE
+	mov	r6, sp
+	msr	cpsr_c, #PSR_F_BIT | PSR_I_BIT | SVC_MODE
+	stmfd	sp!, {r4 - r6}
+
 	@ get coprocessor registers
 	mrc 	p15, 0, r4, c3, c0, 0		@ domain ID
 	mrc 	p15, 0, r5, c2, c0, 0		@ translation table base addr
@@ -210,6 +220,17 @@ sleep_save_sp:
 	.text
 resume_after_mmu:
 	mcr     p15, 0, r1, c15, c1, 2		@ enable clock switching
+
+	@ restore IRQ, abort and undefined mode stack pointers
+	ldmfd	sp!, {r4 - r6}
+	msr	cpsr_c, #PSR_F_BIT | PSR_I_BIT | IRQ_MODE
+	mov	sp, r4
+	msr	cpsr_c, #PSR_F_BIT | PSR_I_BIT | ABT_MODE
+	mov	sp, r5
+	msr	cpsr_c, #PSR_F_BIT | PSR_I_BIT | UND_MODE
+	mov	sp, r6
+	msr	cpsr_c, #PSR_F_BIT | PSR_I_BIT | SVC_MODE
+
 	ldmfd	sp!, {r4 - r12, pc}		@ return to caller
 
 
Quoted 9 lines
Quoted 4 lines

Please note that you may see other ARM breakage over the next month or so - I'm going to be concentrating on merging ARM SMP support, and whatever bashing other people like yourself can give the kernel will help ensure that problems are picked up quickly.

In order to assist with that, can you publish these patches somewhere? That way, I can apply them against a known good Zaurus kernel tree and know straight away if they break anything (diff/patch format would be preferable as my Zaurus trees are all patch based).

I'll see what I can do, but I'm going to be working fairly rapidly on merging this, so expect roughly a patch each day. Hopefully though, the later patches will only affect the Integrator platform.

Signature · 3 lines
Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of:  2.6 Serial core
#41 lore raw
Quoted 7 lines · Russell King
Quoted 6 lines · Richard Purdie
Quoted 4 lines · Russell King

Thinking about what's probably happening, I suspect all the ARM suspend and resume code needs to be reworked to save more state. I'll try to cook up a patch tomorrow to fix it, but I'll need you to provide feedback.

Quoted 5 lines
Quoted 1 line

Ok, thanks. I'm happy to test any fixes/patches.

This should resolve the problem - we now rely on the stack pointer for each CPU mode to remain constant throughout the running time of the kernel, which includes across suspend/resume cycles.

Actually, this patch is probably an all-round better solution.

arch/arm/kernel/setup.c +1 -1
@@ -328,7 +328,7 @@ static void __init setup_processor(void)
  * cpu_init dumps the cache information, initialises SMP specific
  * information, and sets up the per-CPU stacks.
  */
-void __init cpu_init(void)
+void cpu_init(void)
 {
 	unsigned int cpu = smp_processor_id();
 	struct stack *stk = &stacks[cpu];
arch/arm/mach-pxa/pm.c +2 -0
@@ -133,6 +133,8 @@ static int pxa_pm_enter(suspend_state_t 
 	/* *** go zzz *** */
 	pxa_cpu_pm_enter(state);
 
+	cpu_init();
+
 	/* after sleeping, validate the checksum */
 	checksum = 0;
 	for (i = 0; i < SLEEP_SAVE_SIZE - 1; i++)
arch/arm/mach-sa1100/pm.c +2 -0
@@ -88,6 +88,8 @@ static int sa11x0_pm_enter(suspend_state
 	/* go zzz */
 	sa1100_cpu_suspend();
 
+	cpu_init();
+
 	/*
 	 * Ensure not to come back here if it wasn't intended
 	 */
include/asm-arm/system.h +1 -0
@@ -104,6 +104,7 @@ extern void show_pte(struct mm_struct *m
 extern void __show_regs(struct pt_regs *);
 
 extern int cpu_architecture(void);
+extern void cpu_init(void);
 
 #define set_cr(x)					\
 	__asm__ __volatile__(				\
Signature · 3 lines
Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of:  2.6 Serial core
#42 lore raw
Quoted 8 lines · Russell King
Quoted 7 lines · Russell King
Quoted 6 lines · Richard Purdie
Quoted 4 lines · Russell King

Thinking about what's probably happening, I suspect all the ARM suspend and resume code needs to be reworked to save more state. I'll try to cook up a patch tomorrow to fix it, but I'll need you to provide feedback.

Quoted 7 lines
Quoted 5 lines
Quoted 1 line

Ok, thanks. I'm happy to test any fixes/patches.

This should resolve the problem - we now rely on the stack pointer for each CPU mode to remain constant throughout the running time of the kernel, which includes across suspend/resume cycles.

Actually, this patch is probably an all-round better solution.

This patch (the simpler of the two using cpu_init()) allows the pxa to suspend/resume happily with the git-arm-smp.patch applied.

Richard

#43 lore raw
Quoted 2 lines · Richard Purdie

This patch (the simpler of the two using cpu_init()) allows the pxa to suspend/resume happily with the git-arm-smp.patch applied.

Good. Fix committed.

Next batched smp patch can be found at www.home.arm.../~rmk/nightly which I'm currently planning to go to Linus tonight.

Signature · 3 lines
Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of:  2.6 Serial core
#44 lore raw
Quoted 1 line · Russell King

Good. Fix committed.

Thanks.

Quoted 2 lines

Next batched smp patch can be found at www.home.arm.../~rmk/nightly which I'm currently planning to go to Linus tonight.

I applied smp-20050619.patch to 2.6.12-rc6-mm1 + the last fix and the Zaurus seems perfectly happy with it. Let me know as and when you have further releases that need testing (a message to linux-arm-kernel might be the best way to announce them?).

Richard

#45 lore raw
Quoted 8 lines · Richard Purdie
Quoted 2 lines · Russell King

Next batched smp patch can be found at www.home.arm.../~rmk/nightly which I'm currently planning to go to Linus tonight.

I applied smp-20050619.patch to 2.6.12-rc6-mm1 + the last fix and the Zaurus seems perfectly happy with it. Let me know as and when you have further releases that need testing (a message to linux-arm-kernel might be the best way to announce them?).

Thanks for testing. Most of the other patches are platform specific so this may not be required. However, if there are other changes to non-platform specific, I'll try to point them out a couple of days before they get merged.

Signature · 3 lines
Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of:  2.6 Serial core
#46 lore raw
In reply to Andrew Morton
Quoted 2 lines · Andrew Morton

ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.12-rc6/2. 6.12-rc6-mm1/

After looking in my dmesg output today, I saw following error with 2.6.12-rc6-mm1, maybe it's usefull to you. I don't know when it exactly happens, cause I never used mono last time, I just did an emerge mono on my gentoo system, maybe this forced the failure.

note: mono[26736] exited with preempt_count 1
scheduling while atomic: mono/0x10000001/26736

Call Trace:<ffffffff803e13ea>{schedule+122} <ffffffff8013197b>{vprintk+635}
       <ffffffff803e2738>{cond_resched+56} <ffffffff80164de3>{unmap_vmas+1587}
       <ffffffff8016a560>{exit_mmap+128} <ffffffff8012e7bf>{mmput+31}
       <ffffffff80133466>{do_exit+438} 
<ffffffff8013bf25>{__dequeue_signal+501}
       <ffffffff801340c8>{do_group_exit+280} 
<ffffffff8013e147>{get_signal_to_deliver+1575}
       <ffffffff8010de92>{do_signal+162} 
<ffffffff8012d1e0>{default_wake_function+0}
       <ffffffff8010e8e1>{sys_rt_sigreturn+577} 
<ffffffff8010eb3f>{sysret_signal+28}
       <ffffffff8010ee27>{ptregscall_common+103}

cheers,
dominik

#47 lore raw
Quoted 7 lines · Dominik Karall

After looking in my dmesg output today, I saw following error with 2.6.12-rc6-mm1, maybe it's usefull to you. I don't know when it exactly happens, cause I never used mono last time, I just did an emerge mono on my gentoo system, maybe this forced the failure.

note: mono[26736] exited with preempt_count 1
scheduling while atomic: mono/0x10000001/26736

I've filed a bug at kernel bugzilla, so your report won't be lost. See http://bugme.osdl.org/show_bug.cgi?id=4794

You can register at http://bugme.osdl.org/createaccount.cgi and add yourself to CC list.

#48 lore raw
In reply to Dominik Karall
Quoted 13 lines · Dominik Karall
Quoted 2 lines · Andrew Morton

ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.12-rc6/2. 6.12-rc6-mm1/

After looking in my dmesg output today, I saw following error with 2.6.12-rc6-mm1, maybe it's usefull to you. I don't know when it exactly happens, cause I never used mono last time, I just did an emerge mono on my gentoo system, maybe this forced the failure.

note: mono[26736] exited with preempt_count 1
scheduling while atomic: mono/0x10000001/26736

Quoted 13 lines
Call Trace:<ffffffff803e13ea>{schedule+122} <ffffffff8013197b>{vprintk+635}
       <ffffffff803e2738>{cond_resched+56} <ffffffff80164de3>{unmap_vmas+1587}
       <ffffffff8016a560>{exit_mmap+128} <ffffffff8012e7bf>{mmput+31}
       <ffffffff80133466>{do_exit+438} 
<ffffffff8013bf25>{__dequeue_signal+501}
       <ffffffff801340c8>{do_group_exit+280} 
<ffffffff8013e147>{get_signal_to_deliver+1575}
       <ffffffff8010de92>{do_signal+162} 
<ffffffff8012d1e0>{default_wake_function+0}
       <ffffffff8010e8e1>{sys_rt_sigreturn+577} 
<ffffffff8010eb3f>{sysret_signal+28}
       <ffffffff8010ee27>{ptregscall_common+103}

A couple of people reported this, but all seems to have gone quiet. Is it
fixed in later -mm's? Is 2.6.13-rc4 running OK?

Thanks.

#49 lore raw
Quoted 26 lines · Andrew Morton
Quoted 17 lines · Dominik Karall
Quoted 2 lines · Andrew Morton

ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.12-rc 6/2. 6.12-rc6-mm1/

After looking in my dmesg output today, I saw following error with 2.6.12-rc6-mm1, maybe it's usefull to you. I don't know when it exactly happens, cause I never used mono last time, I just did an emerge mono on my gentoo system, maybe this forced the failure.

note: mono[26736] exited with preempt_count 1
scheduling while atomic: mono/0x10000001/26736

Call Trace:<ffffffff803e13ea>{schedule+122}

<ffffffff8013197b>{vprintk+635} <ffffffff803e2738>{cond_resched+56} <ffffffff80164de3>{unmap_vmas+1587} <ffffffff8016a560>{exit_mmap+128} <ffffffff8012e7bf>{mmput+31} <ffffffff80133466>{do_exit+438} <ffffffff8013bf25>{__dequeue_signal+501}

Quoted 7 lines
       <ffffffff801340c8>{do_group_exit+280}
<ffffffff8013e147>{get_signal_to_deliver+1575}
       <ffffffff8010de92>{do_signal+162}
<ffffffff8012d1e0>{default_wake_function+0}
       <ffffffff8010e8e1>{sys_rt_sigreturn+577}
<ffffffff8010eb3f>{sysret_signal+28}
       <ffffffff8010ee27>{ptregscall_common+103}
Quoted 4 lines

A couple of people reported this, but all seems to have gone quiet. Is it
fixed in later -mm's? Is 2.6.13-rc4 running OK?

Thanks.

hi andrew!

I'm sorry, but it's not fixed in current 2.6.13-rc3-mm3. I did an emerge mono right now to test it, and I got this one:

Jul 29 15:26:37 [kernel] note: mono[11138] exited with preempt_count 1
Jul 29 15:26:50 [kernel] file[14627]: segfault at 00002aaaab453000 rip 
00002aaaaaf652cf rsp 00007fffffe43b50 error 4
Jul 29 15:26:50 [kernel] file[14633]: segfault at 00002aaaab453000 rip 
00002aaaaaf652cf rsp 00007fffffcc87a0 error 4
Jul 29 15:26:51 [kernel] file[14669]: segfault at 00002aaaab453000 rip 

00002aaaaaf652cf rsp 00007fffff905f80 error 4

DEBUG_KERNEL/ PREEMPT/ SPINLOCK are enabled, but I didn't get more info about the bug. Did I forget any debug option?

greets,
dominik

#50 lore raw
Quoted 43 lines · Dominik Karall
Quoted 26 lines · Andrew Morton
Quoted 17 lines · Dominik Karall
Quoted 2 lines · Andrew Morton

ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.12-rc 6/2. 6.12-rc6-mm1/

After looking in my dmesg output today, I saw following error with 2.6.12-rc6-mm1, maybe it's usefull to you. I don't know when it exactly happens, cause I never used mono last time, I just did an emerge mono on my gentoo system, maybe this forced the failure.

note: mono[26736] exited with preempt_count 1
scheduling while atomic: mono/0x10000001/26736

Call Trace:<ffffffff803e13ea>{schedule+122}

<ffffffff8013197b>{vprintk+635} <ffffffff803e2738>{cond_resched+56} <ffffffff80164de3>{unmap_vmas+1587} <ffffffff8016a560>{exit_mmap+128} <ffffffff8012e7bf>{mmput+31} <ffffffff80133466>{do_exit+438} <ffffffff8013bf25>{__dequeue_signal+501}

Quoted 7 lines
       <ffffffff801340c8>{do_group_exit+280}
<ffffffff8013e147>{get_signal_to_deliver+1575}
       <ffffffff8010de92>{do_signal+162}
<ffffffff8012d1e0>{default_wake_function+0}
       <ffffffff8010e8e1>{sys_rt_sigreturn+577}
<ffffffff8010eb3f>{sysret_signal+28}
       <ffffffff8010ee27>{ptregscall_common+103}
Quoted 4 lines

A couple of people reported this, but all seems to have gone quiet. Is it
fixed in later -mm's? Is 2.6.13-rc4 running OK?

Thanks.

hi andrew!

I'm sorry, but it's not fixed in current 2.6.13-rc3-mm3. I did an emerge mono right now to test it, and I got this one:

Jul 29 15:26:37 [kernel] note: mono[11138] exited with preempt_count 1
Jul 29 15:26:50 [kernel] file[14627]: segfault at 00002aaaab453000 rip 
00002aaaaaf652cf rsp 00007fffffe43b50 error 4
Jul 29 15:26:50 [kernel] file[14633]: segfault at 00002aaaab453000 rip 
00002aaaaaf652cf rsp 00007fffffcc87a0 error 4
Jul 29 15:26:51 [kernel] file[14669]: segfault at 00002aaaab453000 rip 
Quoted 4 lines

00002aaaaaf652cf rsp 00007fffff905f80 error 4

DEBUG_KERNEL/ PREEMPT/ SPINLOCK are enabled, but I didn't get more info about the bug. Did I forget any debug option?

Gee, I don't know how to find this one. Do you know if the problem is specific to -mm?

#51 lore raw
Quoted 45 lines · Andrew Morton
Quoted 44 lines · Dominik Karall
Quoted 26 lines · Andrew Morton
Quoted 17 lines · Dominik Karall
Quoted 2 lines · Andrew Morton

ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.1 2-rc 6/2. 6.12-rc6-mm1/

After looking in my dmesg output today, I saw following error with 2.6.12-rc6-mm1, maybe it's usefull to you. I don't know when it exactly happens, cause I never used mono last time, I just did an emerge mono on my gentoo system, maybe this forced the failure.

note: mono[26736] exited with preempt_count 1
scheduling while atomic: mono/0x10000001/26736

Call Trace:<ffffffff803e13ea>{schedule+122}

<ffffffff8013197b>{vprintk+635} <ffffffff803e2738>{cond_resched+56} <ffffffff80164de3>{unmap_vmas+1587} <ffffffff8016a560>{exit_mmap+128} <ffffffff8012e7bf>{mmput+31} <ffffffff80133466>{do_exit+438} <ffffffff8013bf25>{__dequeue_signal+501}

Quoted 7 lines
       <ffffffff801340c8>{do_group_exit+280}
<ffffffff8013e147>{get_signal_to_deliver+1575}
       <ffffffff8010de92>{do_signal+162}
<ffffffff8012d1e0>{default_wake_function+0}
       <ffffffff8010e8e1>{sys_rt_sigreturn+577}
<ffffffff8010eb3f>{sysret_signal+28}
       <ffffffff8010ee27>{ptregscall_common+103}
Quoted 4 lines

A couple of people reported this, but all seems to have gone quiet. Is
it fixed in later -mm's? Is 2.6.13-rc4 running OK?

Thanks.

hi andrew!

I'm sorry, but it's not fixed in current 2.6.13-rc3-mm3. I did an emerge mono right now to test it, and I got this one:

Jul 29 15:26:37 [kernel] note: mono[11138] exited with preempt_count 1
Jul 29 15:26:50 [kernel] file[14627]: segfault at 00002aaaab453000 rip
00002aaaaaf652cf rsp 00007fffffe43b50 error 4
Jul 29 15:26:50 [kernel] file[14633]: segfault at 00002aaaab453000 rip
00002aaaaaf652cf rsp 00007fffffcc87a0 error 4
Jul 29 15:26:51 [kernel] file[14669]: segfault at 00002aaaab453000 rip

00002aaaaaf652cf rsp 00007fffff905f80 error 4

Quoted 5 lines
Quoted 2 lines

DEBUG_KERNEL/ PREEMPT/ SPINLOCK are enabled, but I didn't get more info about the bug. Did I forget any debug option?

Gee, I don't know how to find this one. Do you know if the problem is specific to -mm?

Tested with 2.6.13-rc4 and it seems to work. Didn't get any error.

So it seems to be -mm related. Do you suspect any patch which could cause the error?

dominik

#52 lore raw
Quoted 47 lines · Dominik Karall
Quoted 45 lines · Andrew Morton
Quoted 44 lines · Dominik Karall
Quoted 26 lines · Andrew Morton
Quoted 17 lines · Dominik Karall
Quoted 2 lines · Andrew Morton

ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.1 2-rc 6/2. 6.12-rc6-mm1/

After looking in my dmesg output today, I saw following error with 2.6.12-rc6-mm1, maybe it's usefull to you. I don't know when it exactly happens, cause I never used mono last time, I just did an emerge mono on my gentoo system, maybe this forced the failure.

note: mono[26736] exited with preempt_count 1
scheduling while atomic: mono/0x10000001/26736

Call Trace:<ffffffff803e13ea>{schedule+122}

<ffffffff8013197b>{vprintk+635} <ffffffff803e2738>{cond_resched+56} <ffffffff80164de3>{unmap_vmas+1587} <ffffffff8016a560>{exit_mmap+128} <ffffffff8012e7bf>{mmput+31} <ffffffff80133466>{do_exit+438} <ffffffff8013bf25>{__dequeue_signal+501}

Quoted 7 lines
       <ffffffff801340c8>{do_group_exit+280}
<ffffffff8013e147>{get_signal_to_deliver+1575}
       <ffffffff8010de92>{do_signal+162}
<ffffffff8012d1e0>{default_wake_function+0}
       <ffffffff8010e8e1>{sys_rt_sigreturn+577}
<ffffffff8010eb3f>{sysret_signal+28}
       <ffffffff8010ee27>{ptregscall_common+103}
Quoted 4 lines

A couple of people reported this, but all seems to have gone quiet. Is
it fixed in later -mm's? Is 2.6.13-rc4 running OK?

Thanks.

hi andrew!

I'm sorry, but it's not fixed in current 2.6.13-rc3-mm3. I did an emerge mono right now to test it, and I got this one:

Jul 29 15:26:37 [kernel] note: mono[11138] exited with preempt_count 1
Jul 29 15:26:50 [kernel] file[14627]: segfault at 00002aaaab453000 rip
00002aaaaaf652cf rsp 00007fffffe43b50 error 4
Jul 29 15:26:50 [kernel] file[14633]: segfault at 00002aaaab453000 rip
00002aaaaaf652cf rsp 00007fffffcc87a0 error 4
Jul 29 15:26:51 [kernel] file[14669]: segfault at 00002aaaab453000 rip

00002aaaaaf652cf rsp 00007fffff905f80 error 4

Quoted 7 lines
Quoted 5 lines
Quoted 2 lines

DEBUG_KERNEL/ PREEMPT/ SPINLOCK are enabled, but I didn't get more info about the bug. Did I forget any debug option?

Gee, I don't know how to find this one. Do you know if the problem is specific to -mm?

Tested with 2.6.13-rc4 and it seems to work. Didn't get any error.

Great, thanks for that.

Quoted 2 lines

So it seems to be -mm related. Do you suspect any patch which could cause the error?

I wouldn't know, sorry. Possible the scheduler patches, possibly an x86_64-specific patch. Is the problem repeatable? If so, a binary search would only take ten build-n-boots ;)

#53 lore raw
Quoted 58 lines · Andrew Morton
Quoted 49 lines · Dominik Karall
Quoted 48 lines · Andrew Morton
Quoted 47 lines · Dominik Karall
Quoted 29 lines · Andrew Morton
Quoted 20 lines · Dominik Karall
Quoted 2 lines · Andrew Morton

ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2 .6.1 2-rc 6/2. 6.12-rc6-mm1/

After looking in my dmesg output today, I saw following error with 2.6.12-rc6-mm1, maybe it's usefull to you. I don't know when it exactly happens, cause I never used mono last time, I just did an emerge mono on my gentoo system, maybe this forced the failure.

note: mono[26736] exited with preempt_count 1
scheduling while atomic: mono/0x10000001/26736

Call Trace:<ffffffff803e13ea>{schedule+122}

<ffffffff8013197b>{vprintk+635} <ffffffff803e2738>{cond_resched+56} <ffffffff80164de3>{unmap_vmas+1587} <ffffffff8016a560>{exit_mmap+128} <ffffffff8012e7bf>{mmput+31} <ffffffff80133466>{do_exit+438} <ffffffff8013bf25>{__dequeue_signal+501}

Quoted 7 lines
       <ffffffff801340c8>{do_group_exit+280}
<ffffffff8013e147>{get_signal_to_deliver+1575}
       <ffffffff8010de92>{do_signal+162}
<ffffffff8012d1e0>{default_wake_function+0}
       <ffffffff8010e8e1>{sys_rt_sigreturn+577}
<ffffffff8010eb3f>{sysret_signal+28}
       <ffffffff8010ee27>{ptregscall_common+103}
Quoted 4 lines

A couple of people reported this, but all seems to have gone quiet.
Is it fixed in later -mm's? Is 2.6.13-rc4 running OK?

Thanks.

hi andrew!

I'm sorry, but it's not fixed in current 2.6.13-rc3-mm3. I did an emerge mono right now to test it, and I got this one:

Jul 29 15:26:37 [kernel] note: mono[11138] exited with preempt_count
1 Jul 29 15:26:50 [kernel] file[14627]: segfault at 00002aaaab453000
rip 00002aaaaaf652cf rsp 00007fffffe43b50 error 4
Jul 29 15:26:50 [kernel] file[14633]: segfault at 00002aaaab453000
rip 00002aaaaaf652cf rsp 00007fffffcc87a0 error 4
Jul 29 15:26:51 [kernel] file[14669]: segfault at 00002aaaab453000

rip 00002aaaaaf652cf rsp 00007fffff905f80 error 4

Quoted 7 lines
Quoted 5 lines
Quoted 2 lines

DEBUG_KERNEL/ PREEMPT/ SPINLOCK are enabled, but I didn't get more info about the bug. Did I forget any debug option?

Gee, I don't know how to find this one. Do you know if the problem is specific to -mm?

Tested with 2.6.13-rc4 and it seems to work. Didn't get any error.

Quoted 8 lines

Great, thanks for that.

Quoted 2 lines

So it seems to be -mm related. Do you suspect any patch which could cause the error?

I wouldn't know, sorry. Possible the scheduler patches, possibly an x86_64-specific patch. Is the problem repeatable? If so, a binary search would only take ten build-n-boots ;)

Yes, it is repeatable. I tested on lastest -mm about 4 times. Ok, I will try to find the right patch tomorrow, 10 build-n-boots would end up in morning ;)

btw, as the error occured in 2.6.12-rc6-mm1 too, it must be an old patch which wasn't merged to linus tree till now...hope there aren't a lot of them :)

#54 lore raw
Quoted 69 lines · Dominik Karall
Quoted 58 lines · Andrew Morton
Quoted 49 lines · Dominik Karall
Quoted 48 lines · Andrew Morton
Quoted 47 lines · Dominik Karall
Quoted 29 lines · Andrew Morton
Quoted 20 lines · Dominik Karall
Quoted 2 lines · Andrew Morton

ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2 .6.1 2-rc 6/2. 6.12-rc6-mm1/

After looking in my dmesg output today, I saw following error with 2.6.12-rc6-mm1, maybe it's usefull to you. I don't know when it exactly happens, cause I never used mono last time, I just did an emerge mono on my gentoo system, maybe this forced the failure.

note: mono[26736] exited with preempt_count 1
scheduling while atomic: mono/0x10000001/26736

Call Trace:<ffffffff803e13ea>{schedule+122}

<ffffffff8013197b>{vprintk+635} <ffffffff803e2738>{cond_resched+56} <ffffffff80164de3>{unmap_vmas+1587} <ffffffff8016a560>{exit_mmap+128} <ffffffff8012e7bf>{mmput+31} <ffffffff80133466>{do_exit+438} <ffffffff8013bf25>{__dequeue_signal+501}

Quoted 7 lines
       <ffffffff801340c8>{do_group_exit+280}
<ffffffff8013e147>{get_signal_to_deliver+1575}
       <ffffffff8010de92>{do_signal+162}
<ffffffff8012d1e0>{default_wake_function+0}
       <ffffffff8010e8e1>{sys_rt_sigreturn+577}
<ffffffff8010eb3f>{sysret_signal+28}
       <ffffffff8010ee27>{ptregscall_common+103}
Quoted 4 lines

A couple of people reported this, but all seems to have gone quiet.
Is it fixed in later -mm's? Is 2.6.13-rc4 running OK?

Thanks.

hi andrew!

I'm sorry, but it's not fixed in current 2.6.13-rc3-mm3. I did an emerge mono right now to test it, and I got this one:

Jul 29 15:26:37 [kernel] note: mono[11138] exited with preempt_count
1 Jul 29 15:26:50 [kernel] file[14627]: segfault at 00002aaaab453000
rip 00002aaaaaf652cf rsp 00007fffffe43b50 error 4
Jul 29 15:26:50 [kernel] file[14633]: segfault at 00002aaaab453000
rip 00002aaaaaf652cf rsp 00007fffffcc87a0 error 4
Jul 29 15:26:51 [kernel] file[14669]: segfault at 00002aaaab453000

rip 00002aaaaaf652cf rsp 00007fffff905f80 error 4

Quoted 7 lines
Quoted 5 lines
Quoted 2 lines

DEBUG_KERNEL/ PREEMPT/ SPINLOCK are enabled, but I didn't get more info about the bug. Did I forget any debug option?

Gee, I don't know how to find this one. Do you know if the problem is specific to -mm?

Tested with 2.6.13-rc4 and it seems to work. Didn't get any error.

Quoted 8 lines

Great, thanks for that.

Quoted 2 lines

So it seems to be -mm related. Do you suspect any patch which could cause the error?

I wouldn't know, sorry. Possible the scheduler patches, possibly an x86_64-specific patch. Is the problem repeatable? If so, a binary search would only take ten build-n-boots ;)

Quoted 6 lines

Yes, it is repeatable. I tested on lastest -mm about 4 times. Ok, I will try to find the right patch tomorrow, 10 build-n-boots would end up in morning ;)

btw, as the error occured in 2.6.12-rc6-mm1 too, it must be an old patch which wasn't merged to linus tree till now...hope there aren't a lot of them :)

Any progress on this? It kinda measn that the whole of the -mm lineup is stuck until we can identify the offending patch. We have a couple of weeks in which to do this but if you can identify the bad patch it'd help enormously, thanks.

#55 lore raw
Quoted 74 lines · Andrew Morton
Quoted 72 lines · Dominik Karall
Quoted 58 lines · Andrew Morton
Quoted 49 lines · Dominik Karall
Quoted 48 lines · Andrew Morton
Quoted 47 lines · Dominik Karall
Quoted 29 lines · Andrew Morton
Quoted 20 lines · Dominik Karall
Quoted 2 lines · Andrew Morton

ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2 .6.1 2-rc 6/2. 6.12-rc6-mm1/

After looking in my dmesg output today, I saw following error with 2.6.12-rc6-mm1, maybe it's usefull to you. I don't know when it exactly happens, cause I never used mono last time, I just did an emerge mono on my gentoo system, maybe this forced the failure.

note: mono[26736] exited with preempt_count 1
scheduling while atomic: mono/0x10000001/26736

Call Trace:<ffffffff803e13ea>{schedule+122}

<ffffffff8013197b>{vprintk+635} <ffffffff803e2738>{cond_resched+56} <ffffffff80164de3>{unmap_vmas+1587} <ffffffff8016a560>{exit_mmap+128} <ffffffff8012e7bf>{mmput+31} <ffffffff80133466>{do_exit+438} <ffffffff8013bf25>{__dequeue_signal+501}

Quoted 7 lines
       <ffffffff801340c8>{do_group_exit+280}
<ffffffff8013e147>{get_signal_to_deliver+1575}
       <ffffffff8010de92>{do_signal+162}
<ffffffff8012d1e0>{default_wake_function+0}
       <ffffffff8010e8e1>{sys_rt_sigreturn+577}
<ffffffff8010eb3f>{sysret_signal+28}
       <ffffffff8010ee27>{ptregscall_common+103}
Quoted 4 lines

A couple of people reported this, but all seems to have gone quiet.
Is it fixed in later -mm's? Is 2.6.13-rc4 running OK?

Thanks.

hi andrew!

I'm sorry, but it's not fixed in current 2.6.13-rc3-mm3. I did an emerge mono right now to test it, and I got this one:

Jul 29 15:26:37 [kernel] note: mono[11138] exited with preempt_count
1 Jul 29 15:26:50 [kernel] file[14627]: segfault at 00002aaaab453000
rip 00002aaaaaf652cf rsp 00007fffffe43b50 error 4
Jul 29 15:26:50 [kernel] file[14633]: segfault at 00002aaaab453000
rip 00002aaaaaf652cf rsp 00007fffffcc87a0 error 4
Jul 29 15:26:51 [kernel] file[14669]: segfault at 00002aaaab453000

rip 00002aaaaaf652cf rsp 00007fffff905f80 error 4

Quoted 7 lines
Quoted 5 lines
Quoted 2 lines

DEBUG_KERNEL/ PREEMPT/ SPINLOCK are enabled, but I didn't get more info about the bug. Did I forget any debug option?

Gee, I don't know how to find this one. Do you know if the problem is specific to -mm?

Tested with 2.6.13-rc4 and it seems to work. Didn't get any error.

Quoted 8 lines

Great, thanks for that.

Quoted 2 lines

So it seems to be -mm related. Do you suspect any patch which could cause the error?

I wouldn't know, sorry. Possible the scheduler patches, possibly an x86_64-specific patch. Is the problem repeatable? If so, a binary search would only take ten build-n-boots ;)

Yes, it is repeatable. I tested on lastest -mm about 4 times. Ok, I will try to find the right patch tomorrow, 10 build-n-boots would end up in morning ;)

Quoted 9 lines
Quoted 3 lines

btw, as the error occured in 2.6.12-rc6-mm1 too, it must be an old patch which wasn't merged to linus tree till now...hope there aren't a lot of them :)

Any progress on this? It kinda measn that the whole of the -mm lineup is stuck until we can identify the offending patch. We have a couple of weeks in which to do this but if you can identify the bad patch it'd help enormously, thanks.

OK, Bartosz Taudul tells me that he's occasionally seeing this on stock 2.6.12 (thanks!). So there's not a lot of point in doing the -mm bisection search.

I think Ingo was planning on coming up with some infrastructure which would allow us to debug this further.

#56 lore raw
Quoted 88 lines · Andrew Morton
Quoted 78 lines · Andrew Morton
Quoted 77 lines · Dominik Karall
Quoted 63 lines · Andrew Morton
Quoted 54 lines · Dominik Karall
Quoted 53 lines · Andrew Morton
Quoted 52 lines · Dominik Karall
Quoted 30 lines · Andrew Morton
Quoted 21 lines · Dominik Karall
Quoted 2 lines · Andrew Morton

ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches /2.6/2 .6.1 2-rc 6/2. 6.12-rc6-mm1/

After looking in my dmesg output today, I saw following error with 2.6.12-rc6-mm1, maybe it's usefull to you. I don't know when it exactly happens, cause I never used mono last time, I just did an emerge mono on my gentoo system, maybe this forced the failure.

note: mono[26736] exited with preempt_count 1
scheduling while atomic: mono/0x10000001/26736

Call Trace:<ffffffff803e13ea>{schedule+122}

<ffffffff8013197b>{vprintk+635}
<ffffffff803e2738>{cond_resched+56}
<ffffffff80164de3>{unmap_vmas+1587}
<ffffffff8016a560>{exit_mmap+128}
<ffffffff8012e7bf>{mmput+31}
<ffffffff80133466>{do_exit+438}
<ffffffff8013bf25>{__dequeue_signal+501}

Quoted 7 lines
       <ffffffff801340c8>{do_group_exit+280}
<ffffffff8013e147>{get_signal_to_deliver+1575}
       <ffffffff8010de92>{do_signal+162}
<ffffffff8012d1e0>{default_wake_function+0}
       <ffffffff8010e8e1>{sys_rt_sigreturn+577}
<ffffffff8010eb3f>{sysret_signal+28}
       <ffffffff8010ee27>{ptregscall_common+103}
Quoted 5 lines

A couple of people reported this, but all seems to have gone
quiet. Is it fixed in later -mm's? Is 2.6.13-rc4 running
OK?

Thanks.

hi andrew!

I'm sorry, but it's not fixed in current 2.6.13-rc3-mm3. I did an emerge mono right now to test it, and I got this one:

Jul 29 15:26:37 [kernel] note: mono[11138] exited with
preempt_count 1 Jul 29 15:26:50 [kernel] file[14627]: segfault
at 00002aaaab453000 rip 00002aaaaaf652cf rsp 00007fffffe43b50
error 4
Jul 29 15:26:50 [kernel] file[14633]: segfault at
00002aaaab453000 rip 00002aaaaaf652cf rsp 00007fffffcc87a0
error 4
Jul 29 15:26:51 [kernel] file[14669]: segfault at

00002aaaab453000 rip 00002aaaaaf652cf rsp 00007fffff905f80 error 4

Quoted 7 lines
Quoted 5 lines
Quoted 2 lines

DEBUG_KERNEL/ PREEMPT/ SPINLOCK are enabled, but I didn't get more info about the bug. Did I forget any debug option?

Gee, I don't know how to find this one. Do you know if the problem is specific to -mm?

Tested with 2.6.13-rc4 and it seems to work. Didn't get any error.

Quoted 8 lines

Great, thanks for that.

Quoted 2 lines

So it seems to be -mm related. Do you suspect any patch which could cause the error?

I wouldn't know, sorry. Possible the scheduler patches, possibly an x86_64-specific patch. Is the problem repeatable? If so, a binary search would only take ten build-n-boots ;)

Yes, it is repeatable. I tested on lastest -mm about 4 times. Ok, I will try to find the right patch tomorrow, 10 build-n-boots would end up in morning ;)

Quoted 8 lines
Quoted 3 lines

btw, as the error occured in 2.6.12-rc6-mm1 too, it must be an old patch which wasn't merged to linus tree till now...hope there aren't a lot of them :)

Any progress on this? It kinda measn that the whole of the -mm lineup is stuck until we can identify the offending patch. We have a couple of weeks in which to do this but if you can identify the bad patch it'd help enormously, thanks.

Quoted 6 lines

OK, Bartosz Taudul tells me that he's occasionally seeing this on stock 2.6.12 (thanks!). So there's not a lot of point in doing the -mm bisection search.

I think Ingo was planning on coming up with some infrastructure which would allow us to debug this further.

I'm sorry that I couldn't do the tests earlier, but I had no time this week. I did some tests now and noticed that the bug only occures when kde is running...weird.
I'm going to continue testing tomorrow after work, exactly in 12 hours ;)

I will let you know if I have any news!

dominik

#57 lore raw

PATCH 1/1 preempt-trace.patch

In reply to Andrew Morton
Quoted 2 lines · Andrew Morton

I think Ingo was planning on coming up with some infrastructure which would allow us to debug this further.

yeah. I've done this today and have split it out of the -RT tree, see the patch below. After some exposure in -mm i'd like this feature to go upstream too.

the patch is against recent Linus trees, 2.6.13-rc4 or later should all work. Dominik, could you try it and send us the new kernel logs whenever you happen to hit that warning message again? (Please also enable CONFIG_KALLSYMS_ALL, so that we get as much symbolic data as possible.)

Ingo

------
this patch implements the "non-preemptible section trace" feature, which prints out a "critical section nesting" trace after stackdumps:

 Call Trace:
  [<c0103db1>] show_stack+0x7a/0x90
  [<c0103f36>] show_registers+0x156/0x1ce
  [<c010412e>] die+0xe8/0x172
  [<c010422e>] do_trap+0x76/0xa3
  [<c01044fe>] do_invalid_op+0xa3/0xad
  [<c01039ef>] error_code+0x4f/0x54
  [<c0120be9>] test+0x8/0xa
  [<c0120c41>] sys_gettimeofday+0x56/0x74
  [<c0102eeb>] sysenter_past_esp+0x54/0x75
 ---------------------------
 | preempt count: 00000004 ]
 | 4 levels deep critical section nesting:
 -----------------------------------------
 .. [<c0120bbe>] .... test3+0xd/0xf
 .....[<c0120bc8>] ..   ( <= test2+0x8/0x21)
 .. [<c0120bbe>] .... test3+0xd/0xf
 .....[<c0120bcd>] ..   ( <= test2+0xd/0x21)
 .. [<c0120bd7>] .... test2+0x17/0x21
 .....[<c0120be9>] ..   ( <= test+0x8/0xa)
 .. [<c010407f>] .... die+0x39/0x172
 .....[<c010422e>] ..   ( <= do_trap+0x76/0xa3)

this feature is implemented via a low-overhead mechanism by keeping the caller and caller-parent addresses for each disable_preempt() call site, and printing it upon crashes. Note that every other locking API is thus traced too, such as spinlocks, rwlocks, per-cpu variables, etc. This feature is especially useful in identifying leaked preemption counts, as the missing count is displayed as an extra entry in the stack.

the feature is active when PREEMPT_DEBUG is enabled.

i've also cleaned up preemption-count debugging by moving the debug functions out of sched.c into lib/preempt.c.

also, i have added preemption-counter-imbalance checks to the hardirq and softirq processing codepaths. The behavior of preemption-counter checks is now uniform: a warning is printed with all info we have at that point, and the preemption counter is then restored to the old value.

on x86 i have changed the 4KSTACKS feature to inherit the low bits of the preemption-count across hardirq/softirq-context switching, so that the preemption trace entries of interrupts do not overwrite process level preemption trace entries.

boot-tested on x86. Should work on all architectures, but only x86 and x64 has been updated to print the trace-stack out at stackdump time.

This feature was part of the PREEMPT_RT tree for some time and was very useful in debugging preempt-counter leaks and deadlock/lockup situations.

 arch/i386/kernel/irq.c     |   28 ++++++++++++
 arch/i386/kernel/traps.c   |    1 
 arch/x86_64/kernel/traps.c |    1 
 include/linux/sched.h      |   13 +++++
 kernel/exit.c              |    9 ++--
 kernel/irq/handle.c        |   17 +++++++
 kernel/sched.c             |   33 --------------
 kernel/softirq.c           |   16 +++++++
 kernel/timer.c             |   27 +++++++-----
 lib/Makefile               |    2 
 lib/preempt.c              |  101 +++++++++++++++++++++++++++++++++++++++++++++
 11 files changed, 200 insertions(+), 48 deletions(-)
arch/i386/kernel/irq.c +28 -0
Index: linux/arch/i386/kernel/irq.c
===================================================================
@@ -55,6 +55,9 @@ fastcall unsigned int do_IRQ(struct pt_r
 {	
 	/* high bits used in ret_from_ code */
 	int irq = regs->orig_eax & 0xff;
+#ifdef CONFIG_DEBUG_PREEMPT
+	u32 count = preempt_count() & PREEMPT_MASK;
+#endif
 #ifdef CONFIG_4KSTACKS
 	union irq_ctx *curctx, *irqctx;
 	u32 *isp;
@@ -95,6 +98,14 @@ fastcall unsigned int do_IRQ(struct pt_r
 		irqctx->tinfo.task = curctx->tinfo.task;
 		irqctx->tinfo.previous_esp = current_stack_pointer;
 
+		/*
+		 * Keep the preemption-count offset, so that the
+		 * process-level preemption-trace entries do not
+		 * get overwritten by the hardirq context:
+		 */
+#ifdef CONFIG_DEBUG_PREEMPT
+		irqctx->tinfo.preempt_count += count;
+#endif
 		asm volatile(
 			"       xchgl   %%ebx,%%esp      \n"
 			"       call    __do_IRQ         \n"
@@ -103,6 +114,9 @@ fastcall unsigned int do_IRQ(struct pt_r
 			:  "0" (irq),   "1" (regs),  "2" (isp)
 			: "memory", "cc", "ecx"
 		);
+#ifdef CONFIG_DEBUG_PREEMPT
+		irqctx->tinfo.preempt_count -= count;
+#endif
 	} else
 #endif
 		__do_IRQ(irq, regs);
@@ -165,6 +179,9 @@ extern asmlinkage void __do_softirq(void
 
 asmlinkage void do_softirq(void)
 {
+#ifdef CONFIG_DEBUG_PREEMPT
+	u32 count = preempt_count() & PREEMPT_MASK;
+#endif
 	unsigned long flags;
 	struct thread_info *curctx;
 	union irq_ctx *irqctx;
@@ -181,6 +198,14 @@ asmlinkage void do_softirq(void)
 		irqctx->tinfo.task = curctx->task;
 		irqctx->tinfo.previous_esp = current_stack_pointer;
 
+		/*
+		 * Keep the preemption-count offset, so that the
+		 * process-level preemption-trace entries do not
+		 * get overwritten by the softirq context:
+		 */
+#ifdef CONFIG_DEBUG_PREEMPT
+		irqctx->tinfo.preempt_count += count;
+#endif
 		/* build the stack frame on the softirq stack */
 		isp = (u32*) ((char*)irqctx + sizeof(*irqctx));
 
@@ -192,6 +217,9 @@ asmlinkage void do_softirq(void)
 			: "0"(isp)
 			: "memory", "cc", "edx", "ecx", "eax"
 		);
+#ifdef CONFIG_DEBUG_PREEMPT
+		irqctx->tinfo.preempt_count -= count;
+#endif
 	}
 
 	local_irq_restore(flags);
arch/i386/kernel/traps.c +1 -0
Index: linux/arch/i386/kernel/traps.c
===================================================================
@@ -164,6 +164,7 @@ void show_trace(struct task_struct *task
 			break;
 		printk(" =======================\n");
 	}
+	print_preempt_trace(task, preempt_count());
 }
 
 void show_stack(struct task_struct *task, unsigned long *esp)
arch/x86_64/kernel/traps.c +1 -0
Index: linux/arch/x86_64/kernel/traps.c
===================================================================
@@ -221,6 +221,7 @@ void show_trace(unsigned long *stack)
 	HANDLE_STACK (((long) stack & (THREAD_SIZE-1)) != 0);
 #undef HANDLE_STACK
 	printk("\n");
+	print_traces(task);
 }
 
 void show_stack(struct task_struct *tsk, unsigned long * rsp)
include/linux/sched.h +13 -0
Index: linux/include/linux/sched.h
===================================================================
@@ -592,6 +592,14 @@ extern int groups_search(struct group_in
 #define GROUP_AT(gi, i) \
     ((gi)->blocks[(i)/NGROUPS_PER_BLOCK][(i)%NGROUPS_PER_BLOCK])
 
+#ifdef CONFIG_DEBUG_PREEMPT
+# define MAX_PREEMPT_TRACE 25
+extern void print_preempt_trace(struct task_struct *task, u32 count);
+#else
+static inline void print_preempt_trace(struct task_struct *task, u32 count)
+{
+}
+#endif
 
 struct audit_context;		/* See audit.c */
 struct mempolicy;
@@ -770,6 +778,11 @@ struct task_struct {
 	int cpuset_mems_generation;
 #endif
 	atomic_t fs_excl;	/* holding fs exclusive resources */
+
+#ifdef CONFIG_DEBUG_PREEMPT
+	void *preempt_off_caller[MAX_PREEMPT_TRACE];
+	void *preempt_off_parent[MAX_PREEMPT_TRACE];
+#endif
 };
 
 static inline pid_t process_group(struct task_struct *tsk)
kernel/exit.c +5 -4
Index: linux/kernel/exit.c
===================================================================
@@ -821,10 +821,11 @@ fastcall NORET_TYPE void do_exit(long co
  	tsk->it_prof_expires = cputime_zero;
 	tsk->it_sched_expires = 0;
 
-	if (unlikely(in_atomic()))
-		printk(KERN_INFO "note: %s[%d] exited with preempt_count %d\n",
-				current->comm, current->pid,
-				preempt_count());
+	if (unlikely(in_atomic())) {
+		printk(KERN_ERR "BUG: %s[%d] exited with nonzero preempt_count %d!\n",
+				tsk->comm, tsk->pid, preempt_count());
+		print_preempt_trace(tsk, preempt_count());
+	}
 
 	acct_update_integrals(tsk);
 	update_mem_hiwater(tsk);
kernel/irq/handle.c +17 -0
Index: linux/kernel/irq/handle.c
===================================================================
@@ -85,7 +85,24 @@ fastcall int handle_IRQ_event(unsigned i
 		local_irq_enable();
 
 	do {
+#ifdef CONFIG_DEBUG_PREEMPT
+		u32 in_count = preempt_count(), out_count;
+#endif
 		ret = action->handler(irq, action->dev_id, regs);
+#ifdef CONFIG_DEBUG_PREEMPT
+		out_count = preempt_count();
+		if (in_count != out_count) {
+			printk(KERN_ERR "BUG: irq %d [%s] preempt-count "
+				"imbalance: in=%08x, out=%08x!\n",
+				irq, action->name, in_count, out_count);
+			print_preempt_trace(current, out_count);
+			/*
+			 * We already printed all the useful info,
+			 * fix up the preemption count now:
+			 */
+			preempt_count() = in_count;
+		}
+#endif
 		if (ret == IRQ_HANDLED)
 			status |= action->flags;
 		retval |= ret;
kernel/sched.c +1 -32
Index: linux/kernel/sched.c
===================================================================
@@ -47,6 +47,7 @@
 #include <linux/syscalls.h>
 #include <linux/times.h>
 #include <linux/acct.h>
+#include <linux/kallsyms.h>
 #include <asm/tlb.h>
 
 #include <asm/unistd.h>
@@ -2707,38 +2708,6 @@ static inline int dependent_sleeper(int 
 }
 #endif
 
-#if defined(CONFIG_PREEMPT) && defined(CONFIG_DEBUG_PREEMPT)
-
-void fastcall add_preempt_count(int val)
-{
-	/*
-	 * Underflow?
-	 */
-	BUG_ON((preempt_count() < 0));
-	preempt_count() += val;
-	/*
-	 * Spinlock count overflowing soon?
-	 */
-	BUG_ON((preempt_count() & PREEMPT_MASK) >= PREEMPT_MASK-10);
-}
-EXPORT_SYMBOL(add_preempt_count);
-
-void fastcall sub_preempt_count(int val)
-{
-	/*
-	 * Underflow?
-	 */
-	BUG_ON(val > preempt_count());
-	/*
-	 * Is the spinlock portion underflowing?
-	 */
-	BUG_ON((val < PREEMPT_MASK) && !(preempt_count() & PREEMPT_MASK));
-	preempt_count() -= val;
-}
-EXPORT_SYMBOL(sub_preempt_count);
-
-#endif
-
 /*
  * schedule() is the main scheduler function.
  */
kernel/softirq.c +16 -0
Index: linux/kernel/softirq.c
===================================================================
@@ -92,7 +92,23 @@ restart:
 
 	do {
 		if (pending & 1) {
+#ifdef CONFIG_DEBUG_PREEMPT
+			u32 in_count = preempt_count();
+#endif
 			h->action(h);
+#ifdef CONFIG_DEBUG_PREEMPT
+			out_count = preempt_count();
+			if (in_count != out_count) {
+				printk(KERN_ERR "BUG: softirq %d preempt-count "
+					"imbalance: in=%08x, out=%08x!\n",
+					h - softirq_vec, in_count, out_count);
+				print_preempt_trace(current, out_count);
+				/*
+				 * Fix up the bad preemption count:
+				 */
+				preempt_count() = in_count;
+			}
+#endif
 			rcu_bh_qsctr_inc(cpu);
 		}
 		h++;
kernel/timer.c +16 -11
Index: linux/kernel/timer.c
===================================================================
@@ -33,6 +33,7 @@
 #include <linux/posix-timers.h>
 #include <linux/cpu.h>
 #include <linux/syscalls.h>
+#include <linux/kallsyms.h>
 
 #include <asm/uaccess.h>
 #include <asm/unistd.h>
@@ -480,6 +481,7 @@ static inline void __run_timers(tvec_bas
 		while (!list_empty(head)) {
 			void (*fn)(unsigned long);
 			unsigned long data;
+			int in_count, out_count;
 
 			timer = list_entry(head->next,struct timer_list,entry);
  			fn = timer->function;
@@ -488,17 +490,20 @@ static inline void __run_timers(tvec_bas
 			set_running_timer(base, timer);
 			detach_timer(timer, 1);
 			spin_unlock_irq(&base->t_base.lock);
-			{
-				int preempt_count = preempt_count();
-				fn(data);
-				if (preempt_count != preempt_count()) {
-					printk(KERN_WARNING "huh, entered %p "
-					       "with preempt_count %08x, exited"
-					       " with %08x?\n",
-					       fn, preempt_count,
-					       preempt_count());
-					BUG();
-				}
+
+			in_count = preempt_count();
+			fn(data);
+			out_count = preempt_count();
+			if (in_count != out_count) {
+				print_symbol(KERN_ERR "BUG: %s", (long)fn);
+				printk(KERN_ERR "(%p) preempt-count imbalance: "
+					"in=%08x, out=%08x!",
+					fn, in_count, out_count);
+				print_preempt_trace(current, out_count);
+				/*
+				 * Fix up the bad preemption count:
+				 */
+				preempt_count() = in_count;
 			}
 			spin_lock_irq(&base->t_base.lock);
 		}
lib/Makefile +1 -1
Index: linux/lib/Makefile
===================================================================
@@ -20,7 +20,7 @@ lib-$(CONFIG_RWSEM_GENERIC_SPINLOCK) += 
 lib-$(CONFIG_RWSEM_XCHGADD_ALGORITHM) += rwsem.o
 lib-$(CONFIG_GENERIC_FIND_NEXT_BIT) += find_next_bit.o
 obj-$(CONFIG_LOCK_KERNEL) += kernel_lock.o
-obj-$(CONFIG_DEBUG_PREEMPT) += smp_processor_id.o
+obj-$(CONFIG_DEBUG_PREEMPT) += smp_processor_id.o preempt.o
 
 ifneq ($(CONFIG_HAVE_DEC_LOCK),y) 
   lib-y += dec_and_lock.o
lib/preempt.c new file +101 -0

101 lines not on this page · raw message

#58 lore raw

Re: [patch] preempt-trace.patch

Quoted 4 lines · Ingo Molnar
Quoted 2 lines · Andrew Morton

I think Ingo was planning on coming up with some infrastructure which would allow us to debug this further.

Quoted 8 lines

yeah. I've done this today and have split it out of the -RT tree, see the patch below. After some exposure in -mm i'd like this feature to go upstream too.

the patch is against recent Linus trees, 2.6.13-rc4 or later should all work. Dominik, could you try it and send us the new kernel logs whenever you happen to hit that warning message again? (Please also enable CONFIG_KALLSYMS_ALL, so that we get as much symbolic data as possible.)

I tried to compile the patch on top of 2.6.13-rc4-mm1, it applied with a few offsets, but it looked ok.
Here is the error I get when I compiled it:

CC arch/x86_64/kernel/traps.o
arch/x86_64/kernel/traps.c: In function `show_trace':
arch/x86_64/kernel/traps.c:228: warning: implicit declaration of function `print_traces'
arch/x86_64/kernel/traps.c:228: error: `task' undeclared (first use in this function)
arch/x86_64/kernel/traps.c:228: error: (Each undeclared identifier is reported only once
arch/x86_64/kernel/traps.c:228: error: for each function it appears in.) make[1]: *** [arch/x86_64/kernel/traps.o] Error 1

I took a look at the traps.c file, but couldn't find any solution, as there is no print_traces function and task variable too in this section.

dominik

#59 lore raw

PATCH 1/1 preempt-trace-fixes.patch

Quoted 4 lines · Dominik Karall
Quoted 4 lines

yeah. I've done this today and have split it out of the -RT tree, see the patch below. After some exposure in -mm i'd like this feature to go upstream too.

Quoted 8 lines
Quoted 4 lines

the patch is against recent Linus trees, 2.6.13-rc4 or later should all work. Dominik, could you try it and send us the new kernel logs whenever you happen to hit that warning message again? (Please also enable CONFIG_KALLSYMS_ALL, so that we get as much symbolic data as possible.)

I tried to compile the patch on top of 2.6.13-rc4-mm1, it applied with a few offsets, but it looked ok.
Here is the error I get when I compiled it:

ok, does the additional patch below fix things for you?

Ingo

------

- fix the x64 build

- get the preempt_count from the right task on x86 (it's usually 'current', but not always.)

- fix compiler warning in kernel/softirq.c on 64-bit platforms

 arch/i386/kernel/traps.c     |    2 +-
 arch/x86_64/kernel/process.c |    2 +-
 arch/x86_64/kernel/traps.c   |    9 +++++----
 include/asm-x86_64/proto.h   |    2 +-
 kernel/softirq.c             |    2 +-
 5 files changed, 9 insertions(+), 8 deletions(-)
arch/i386/kernel/traps.c +1 -1
Index: linux-preempt-trace/arch/i386/kernel/traps.c
===================================================================
@@ -164,7 +164,7 @@ void show_trace(struct task_struct *task
 			break;
 		printk(" =======================\n");
 	}
-	print_preempt_trace(task, preempt_count());
+	print_preempt_trace(task, task->thread_info->preempt_count);
 }
 
 void show_stack(struct task_struct *task, unsigned long *esp)
arch/x86_64/kernel/process.c +1 -1
Index: linux-preempt-trace/arch/x86_64/kernel/process.c
===================================================================
@@ -311,7 +311,7 @@ void __show_regs(struct pt_regs * regs)
 void show_regs(struct pt_regs *regs)
 {
 	__show_regs(regs);
-	show_trace(&regs->rsp);
+	show_trace(current, &regs->rsp);
 }
 
 /*
arch/x86_64/kernel/traps.c +5 -4
Index: linux-preempt-trace/arch/x86_64/kernel/traps.c
===================================================================
@@ -29,6 +29,7 @@
 #include <linux/module.h>
 #include <linux/moduleparam.h>
 #include <linux/nmi.h>
+#include <linux/sched.h>
 
 #include <asm/system.h>
 #include <asm/uaccess.h>
@@ -156,7 +157,7 @@ static unsigned long *in_exception_stack
  * severe exception (double fault, nmi, stack fault, debug, mce) hardware stack
  */
 
-void show_trace(unsigned long *stack)
+void show_trace(struct task_struct *task, unsigned long *stack)
 {
 	unsigned long addr;
 	const unsigned cpu = safe_smp_processor_id();
@@ -221,7 +222,7 @@ void show_trace(unsigned long *stack)
 	HANDLE_STACK (((long) stack & (THREAD_SIZE-1)) != 0);
 #undef HANDLE_STACK
 	printk("\n");
-	print_traces(task);
+	print_preempt_trace(task, task->thread_info->preempt_count);
 }
 
 void show_stack(struct task_struct *tsk, unsigned long * rsp)
@@ -258,7 +259,7 @@ void show_stack(struct task_struct *tsk,
 		printk("%016lx ", *stack++);
 		touch_nmi_watchdog();
 	}
-	show_trace((unsigned long *)rsp);
+	show_trace(tsk, (unsigned long *)rsp);
 }
 
 /*
@@ -267,7 +268,7 @@ void show_stack(struct task_struct *tsk,
 void dump_stack(void)
 {
 	unsigned long dummy;
-	show_trace(&dummy);
+	show_trace(current, &dummy);
 }
 
 EXPORT_SYMBOL(dump_stack);
include/asm-x86_64/proto.h +1 -1
Index: linux-preempt-trace/include/asm-x86_64/proto.h
===================================================================
@@ -66,7 +66,7 @@ extern unsigned long end_pfn_map; 
 
 extern cpumask_t cpu_initialized;
 
-extern void show_trace(unsigned long * rsp);
+extern void show_trace(struct task_struct *task, unsigned long *rsp);
 extern void show_registers(struct pt_regs *regs);
 
 extern void exception_table_check(void);
kernel/softirq.c +1 -1
Index: linux-preempt-trace/kernel/softirq.c
===================================================================
@@ -99,7 +99,7 @@ restart:
 #ifdef CONFIG_DEBUG_PREEMPT
 			out_count = preempt_count();
 			if (in_count != out_count) {
-				printk(KERN_ERR "BUG: softirq %d preempt-count "
+				printk(KERN_ERR "BUG: softirq %ld preempt-count "
 					"imbalance: in=%08x, out=%08x!\n",
 					h - softirq_vec, in_count, out_count);
 				print_preempt_trace(current, out_count);
#60 lore raw

Re: [patch] preempt-trace-fixes.patch

Quoted 11 lines · Ingo Molnar
Quoted 10 lines · Dominik Karall
Quoted 9 lines

yeah. I've done this today and have split it out of the -RT tree, see the patch below. After some exposure in -mm i'd like this feature to go upstream too.

the patch is against recent Linus trees, 2.6.13-rc4 or later should all work. Dominik, could you try it and send us the new kernel logs whenever you happen to hit that warning message again? (Please also enable CONFIG_KALLSYMS_ALL, so that we get as much symbolic data as possible.)

Quoted 5 lines
Quoted 3 lines

I tried to compile the patch on top of 2.6.13-rc4-mm1, it applied with a few offsets, but it looked ok.
Here is the error I get when I compiled it:

ok, does the additional patch below fix things for you?

Yes, only out_count wasn't defined in softirq.c, here's the patch to fix it. The first patch in traps.c failed on rc4-mm1, but it doesn't matter, as sched.h seems to be already included there. I think it is even included in -rc4 too.

dominik

-----

kernel/softirq.c 2005-08-05 20:02:40.000000000 +0200 renamed from kernel/softirq.c.orig 2005-08-05 20:00:28.000000000 +0200 +1 -1
@@ -93,7 +93,7 @@ restart:
        do {
                if (pending & 1) {
 #ifdef CONFIG_DEBUG_PREEMPT
-                       u32 in_count = preempt_count();
+                       u32 in_count = preempt_count(), out_count;
 #endif
                        h->action(h);
 #ifdef CONFIG_DEBUG_PREEMPT
#61 lore raw

Re: [patch] preempt-trace.patch (mono preempt-trace)

In reply to Ingo Molnar
Quoted 4 lines · Ingo Molnar
Quoted 2 lines · Andrew Morton

I think Ingo was planning on coming up with some infrastructure which would allow us to debug this further.

Quoted 8 lines

yeah. I've done this today and have split it out of the -RT tree, see the patch below. After some exposure in -mm i'd like this feature to go upstream too.

the patch is against recent Linus trees, 2.6.13-rc4 or later should all work. Dominik, could you try it and send us the new kernel logs whenever you happen to hit that warning message again? (Please also enable CONFIG_KALLSYMS_ALL, so that we get as much symbolic data as possible.)

Here's a preempt trace output from mono. To compile preempt-trace.patch I remove the traps.c patch and added u32 definition for out_count in handle.c. After those changes, the kernel compiled fine.

Now here's the output, let me know if it is ok, or if you can make any reveals where the bug is located.

BUG: mono[10011] exited with nonzero preempt_count 1!
---------------------------

| preempt count: 00000001 ]
| 1 level deep critical section nesting:
----------------------------------------
.. [<ffffffff803f791e>] .... _spin_lock+0xe/0x70
.....[<0000000000000000>] .. ( <= 0x0)

If there is anything I should test, let me know!

dominik

#62 lore raw

Re: [patch] preempt-trace.patch (mono preempt-trace)

Quoted 9 lines · Dominik Karall
BUG: mono[10011] exited with nonzero preempt_count 1!
---------------------------

| preempt count: 00000001 ]
| 1 level deep critical section nesting:
----------------------------------------
.. [<ffffffff803f791e>] .... _spin_lock+0xe/0x70
.....[<0000000000000000>] .. ( <= 0x0)

If there is anything I should test, let me know!

please enable CONFIG_FRAME_POINTERS!

we now know that it's a spin_lock reference that got leaked, but we dont (yet) know the parent.

Ingo

#63 lore raw

Re: [patch] preempt-trace.patch (mono preempt-trace)

Quoted 11 lines · Ingo Molnar
Quoted 10 lines · Dominik Karall
BUG: mono[10011] exited with nonzero preempt_count 1!
---------------------------

| preempt count: 00000001 ]
| 1 level deep critical section nesting:

----------------------------------------
.. [<ffffffff803f791e>] .... _spin_lock+0xe/0x70
.....[<0000000000000000>] .. ( <= 0x0)

Quoted 6 lines
Quoted 1 line

If there is anything I should test, let me know!

please enable CONFIG_FRAME_POINTERS!

we now know that it's a spin_lock reference that got leaked, but we dont (yet) know the parent.

I'm sorry, but I think I can't enable CONFIG_FRAME_POINTERS. Depends on: DEBUG_KERNEL && (X86 && !X86_64 || CRIS || M68K || M68KNOMMU || FRV || UML)

Seems to be disabled for x86_64.

dominik

#64 lore raw

Re: [patch] preempt-trace.patch (mono preempt-trace)

Quoted 9 lines · Dominik Karall
Quoted 2 lines · Ingo Molnar

please enable CONFIG_FRAME_POINTERS!

I'm sorry, but I think I can't enable CONFIG_FRAME_POINTERS. Depends on: DEBUG_KERNEL && (X86 && !X86_64 || CRIS || M68K || M68KNOMMU || FRV || UML)

Seems to be disabled for x86_64.

It is disabled for x86_64, but not for any very good reason (beyond reducing the test matrix). I work with CONFIG_FRAME_POINTERS on x86_64 with no trouble, just add in the patch below, make oldconfig, choose frame pointers and rebuild). But I can't guarantee it'll actually reveal the info Ingo and all are longing to see.

Hugh

lib/Kconfig.debug +1 -1
@@ -151,7 +151,7 @@ config DEBUG_FS
 
 config FRAME_POINTER
 	bool "Compile the kernel with frame pointers"
-	depends on DEBUG_KERNEL && ((X86 && !X86_64) || CRIS || M68K || M68KNOMMU || FRV || UML)
+	depends on DEBUG_KERNEL && (X86 || CRIS || M68K || M68KNOMMU || FRV || UML)
 	default y if DEBUG_INFO && UML
 	help
 	  If you say Y here the resulting kernel image will be slightly larger
#65 lore raw

Re: [patch] preempt-trace.patch (mono preempt-trace)

Quoted 8 lines · Hugh Dickins
Quoted 7 lines · Dominik Karall
Quoted 1 line · Ingo Molnar

please enable CONFIG_FRAME_POINTERS!

I'm sorry, but I think I can't enable CONFIG_FRAME_POINTERS. Depends on: DEBUG_KERNEL && (X86 && !X86_64 || CRIS || M68K || M68KNOMMU || FRV || UML)

Quoted 7 lines
Quoted 1 line

Seems to be disabled for x86_64.

It is disabled for x86_64, but not for any very good reason (beyond reducing the test matrix). I work with CONFIG_FRAME_POINTERS on x86_64 with no trouble, just add in the patch below, make oldconfig, choose frame pointers and rebuild). But I can't guarantee it'll actually reveal the info Ingo and all are longing to see.

With FRAME_POINTERS enabled:

BUG: mono[3193] exited with nonzero preempt_count 1!
---------------------------

| preempt count: 00000001 ]
| 1 level deep critical section nesting:
----------------------------------------
.. [<ffffffff80400a46>] .... _spin_lock+0x16/0x80
.....[<ffffffff801ed30c>] .. ( <= sys_semtimedop+0x28c/0x7c0)

hth, let me know!

dominik

#66 lore raw

Re: [patch] preempt-trace.patch (mono preempt-trace)

Quoted 9 lines · Dominik Karall

With FRAME_POINTERS enabled:

BUG: mono[3193] exited with nonzero preempt_count 1!
---------------------------

| preempt count: 00000001 ]
| 1 level deep critical section nesting:
----------------------------------------
.. [<ffffffff80400a46>] .... _spin_lock+0x16/0x80
.....[<ffffffff801ed30c>] .. ( <= sys_semtimedop+0x28c/0x7c0)

thanks. It seems semundo->lock somehow leaked. One possibility would be of semundo->refcount going from 2 to 1 while another thread has it locked. I dont see what prevents this scenario from happening. To test this theory, could you apply the patch below, which will do semundo locking not conditional on the refcount - does it fix the bug?

Ingo

 ipc/sem.c |   10 +++-------
 1 files changed, 3 insertions(+), 7 deletions(-)
ipc/sem.c +3 -7
Index: linux-preempt-trace/ipc/sem.c
===================================================================
@@ -895,7 +895,7 @@ static inline void lock_semundo(void)
 	struct sem_undo_list *undo_list;
 
 	undo_list = current->sysvsem.undo_list;
-	if ((undo_list != NULL) && (atomic_read(&undo_list->refcnt) != 1))
+	if (undo_list)
 		spin_lock(&undo_list->lock);
 }
 
@@ -915,7 +915,7 @@ static inline void unlock_semundo(void)
 	struct sem_undo_list *undo_list;
 
 	undo_list = current->sysvsem.undo_list;
-	if ((undo_list != NULL) && (atomic_read(&undo_list->refcnt) != 1))
+	if (undo_list)
 		spin_unlock(&undo_list->lock);
 }
 
@@ -943,9 +943,7 @@ static inline int get_undo_list(struct s
 		if (undo_list == NULL)
 			return -ENOMEM;
 		memset(undo_list, 0, size);
-		/* don't initialize unodhd->lock here.  It's done
-		 * in copy_semundo() instead.
-		 */
+		spin_lock_init(&undo_list->lock);
 		atomic_set(&undo_list->refcnt, 1);
 		current->sysvsem.undo_list = undo_list;
 	}
@@ -1231,8 +1229,6 @@ int copy_semundo(unsigned long clone_fla
 		error = get_undo_list(&undo_list);
 		if (error)
 			return error;
-		if (atomic_read(&undo_list->refcnt) == 1)
-			spin_lock_init(&undo_list->lock);
 		atomic_inc(&undo_list->refcnt);
 		tsk->sysvsem.undo_list = undo_list;
 	} else 
#67 lore raw

Re: [patch] preempt-trace.patch (mono preempt-trace)

Quoted 13 lines · Ingo Molnar
Quoted 11 lines · Dominik Karall

With FRAME_POINTERS enabled:

BUG: mono[3193] exited with nonzero preempt_count 1!
---------------------------

| preempt count: 00000001 ]
| 1 level deep critical section nesting:

----------------------------------------
.. [<ffffffff80400a46>] .... _spin_lock+0x16/0x80
.....[<ffffffff801ed30c>] .. ( <= sys_semtimedop+0x28c/0x7c0)

Quoted 5 lines

thanks. It seems semundo->lock somehow leaked. One possibility would be of semundo->refcount going from 2 to 1 while another thread has it locked. I dont see what prevents this scenario from happening. To test this theory, could you apply the patch below, which will do semundo locking not conditional on the refcount - does it fix the bug?

yeah! it works, great job! :)

dominik

#68 lore raw

Re: [patch] preempt-trace.patch (mono preempt-trace)

In reply to Ingo Molnar
Quoted 12 lines · Ingo Molnar
Quoted 8 lines · Dominik Karall
BUG: mono[10011] exited with nonzero preempt_count 1!
---------------------------

| preempt count: 00000001 ]
| 1 level deep critical section nesting:
----------------------------------------
.. [<ffffffff803f791e>] .... _spin_lock+0xe/0x70
.....[<0000000000000000>] .. ( <= 0x0)

Quoted 1 line
Quoted 1 line

If there is anything I should test, let me know!

Thanks, Dominik.

Quoted 1 line

please enable CONFIG_FRAME_POINTERS!

Seems a bit tricky. Wouldn't it be best if enabling CONFIG_DEBUG_PREEMPT autoselected CONFIG_KALLSYMS_ALL, CONFIG_FRAME_POINTER and whatever else we need?

#69 lore raw

Re: [patch] preempt-trace.patch (mono preempt-trace)

Quoted 5 lines · Andrew Morton
Quoted 1 line

please enable CONFIG_FRAME_POINTERS!

Seems a bit tricky. Wouldn't it be best if enabling CONFIG_DEBUG_PREEMPT autoselected CONFIG_KALLSYMS_ALL, CONFIG_FRAME_POINTER and whatever else we need?

ok, agreed:

-----
when DEBUG_PREEMPT is enabled, select FRAME_POINTER and KALLSYMS_ALL as well, to make the debug output more useful.

 lib/Kconfig.debug |    3 +++
 1 files changed, 3 insertions(+)
lib/Kconfig.debug +3 -0
Index: linux-preempt-trace/lib/Kconfig.debug
===================================================================
@@ -70,6 +70,9 @@ config DEBUG_PREEMPT
 	bool "Debug preemptible kernel"
 	depends on DEBUG_KERNEL && PREEMPT
 	default y
+	select FRAME_POINTER
+	select KALLSYMS
+	select KALLSYMS_ALL
 	help
 	  If you say Y here then the kernel will use a debug variant of the
 	  commonly used smp_processor_id() function and will print warnings
#70 lore raw

Re: [patch] preempt-trace.patch (mono preempt-trace)

In reply to Andrew Morton

here's a full patch again of all things preempt-trace (excludes the sysv semaphores change):

--------

this patch implements the "non-preemptible section trace" feature, which prints out a "critical section nesting" trace after stackdumps:

 Call Trace:
  [<c0103db1>] show_stack+0x7a/0x90
  [<c0103f36>] show_registers+0x156/0x1ce
  [<c010412e>] die+0xe8/0x172
  [<c010422e>] do_trap+0x76/0xa3
  [<c01044fe>] do_invalid_op+0xa3/0xad
  [<c01039ef>] error_code+0x4f/0x54
  [<c0120be9>] test+0x8/0xa
  [<c0120c41>] sys_gettimeofday+0x56/0x74
  [<c0102eeb>] sysenter_past_esp+0x54/0x75
 ---------------------------
 | preempt count: 00000004 ]
 | 4 levels deep critical section nesting:
 -----------------------------------------
 .. [<c0120bbe>] .... test3+0xd/0xf
 .....[<c0120bc8>] ..   ( <= test2+0x8/0x21)
 .. [<c0120bbe>] .... test3+0xd/0xf
 .....[<c0120bcd>] ..   ( <= test2+0xd/0x21)
 .. [<c0120bd7>] .... test2+0x17/0x21
 .....[<c0120be9>] ..   ( <= test+0x8/0xa)
 .. [<c010407f>] .... die+0x39/0x172
 .....[<c010422e>] ..   ( <= do_trap+0x76/0xa3)

this feature is implemented via a low-overhead mechanism by keeping the caller and caller-parent addresses for each disable_preempt() call site, and printing it upon crashes. Note that every other locking API is thus traced too, such as spinlocks, rwlocks, per-cpu variables, etc. This feature is especially useful in identifying leaked preemption counts, as the missing count is displayed as an extra entry in the stack.

the feature is active when PREEMPT_DEBUG is enabled.

i've also cleaned up preemption-count debugging by moving the debug functions out of sched.c into lib/preempt.c.

also, i have added preemption-counter-imbalance checks to the hardirq and softirq processing codepaths. The behavior of preemption-counter checks is now uniform: a warning is printed with all info we have at that point, and the preemption counter is then restored to the old value.

on x86 i have changed the 4KSTACKS feature to inherit the low bits of the preemption-count across hardirq/softirq-context switching, so that the preemption trace entries of interrupts do not overwrite process level preemption trace entries.

boot-tested on x86. Should work on all architectures.

arch/i386/kernel/irq.c +28 -0
Index: linux-preempt-trace/arch/i386/kernel/irq.c
===================================================================
@@ -55,6 +55,9 @@ fastcall unsigned int do_IRQ(struct pt_r
 {	
 	/* high bits used in ret_from_ code */
 	int irq = regs->orig_eax & 0xff;
+#ifdef CONFIG_DEBUG_PREEMPT
+	u32 count = preempt_count() & PREEMPT_MASK;
+#endif
 #ifdef CONFIG_4KSTACKS
 	union irq_ctx *curctx, *irqctx;
 	u32 *isp;
@@ -95,6 +98,14 @@ fastcall unsigned int do_IRQ(struct pt_r
 		irqctx->tinfo.task = curctx->tinfo.task;
 		irqctx->tinfo.previous_esp = current_stack_pointer;
 
+		/*
+		 * Keep the preemption-count offset, so that the
+		 * process-level preemption-trace entries do not
+		 * get overwritten by the hardirq context:
+		 */
+#ifdef CONFIG_DEBUG_PREEMPT
+		irqctx->tinfo.preempt_count += count;
+#endif
 		asm volatile(
 			"       xchgl   %%ebx,%%esp      \n"
 			"       call    __do_IRQ         \n"
@@ -103,6 +114,9 @@ fastcall unsigned int do_IRQ(struct pt_r
 			:  "0" (irq),   "1" (regs),  "2" (isp)
 			: "memory", "cc", "ecx"
 		);
+#ifdef CONFIG_DEBUG_PREEMPT
+		irqctx->tinfo.preempt_count -= count;
+#endif
 	} else
 #endif
 		__do_IRQ(irq, regs);
@@ -165,6 +179,9 @@ extern asmlinkage void __do_softirq(void
 
 asmlinkage void do_softirq(void)
 {
+#ifdef CONFIG_DEBUG_PREEMPT
+	u32 count = preempt_count() & PREEMPT_MASK;
+#endif
 	unsigned long flags;
 	struct thread_info *curctx;
 	union irq_ctx *irqctx;
@@ -181,6 +198,14 @@ asmlinkage void do_softirq(void)
 		irqctx->tinfo.task = curctx->task;
 		irqctx->tinfo.previous_esp = current_stack_pointer;
 
+		/*
+		 * Keep the preemption-count offset, so that the
+		 * process-level preemption-trace entries do not
+		 * get overwritten by the softirq context:
+		 */
+#ifdef CONFIG_DEBUG_PREEMPT
+		irqctx->tinfo.preempt_count += count;
+#endif
 		/* build the stack frame on the softirq stack */
 		isp = (u32*) ((char*)irqctx + sizeof(*irqctx));
 
@@ -192,6 +217,9 @@ asmlinkage void do_softirq(void)
 			: "0"(isp)
 			: "memory", "cc", "edx", "ecx", "eax"
 		);
+#ifdef CONFIG_DEBUG_PREEMPT
+		irqctx->tinfo.preempt_count -= count;
+#endif
 	}
 
 	local_irq_restore(flags);
arch/i386/kernel/traps.c +1 -0
Index: linux-preempt-trace/arch/i386/kernel/traps.c
===================================================================
@@ -164,6 +164,7 @@ void show_trace(struct task_struct *task
 			break;
 		printk(" =======================\n");
 	}
+	print_preempt_trace(task, task->thread_info->preempt_count);
 }
 
 void show_stack(struct task_struct *task, unsigned long *esp)
arch/x86_64/kernel/process.c +1 -1
Index: linux-preempt-trace/arch/x86_64/kernel/process.c
===================================================================
@@ -311,7 +311,7 @@ void __show_regs(struct pt_regs * regs)
 void show_regs(struct pt_regs *regs)
 {
 	__show_regs(regs);
-	show_trace(&regs->rsp);
+	show_trace(current, &regs->rsp);
 }
 
 /*
arch/x86_64/kernel/traps.c +5 -3
Index: linux-preempt-trace/arch/x86_64/kernel/traps.c
===================================================================
@@ -29,6 +29,7 @@
 #include <linux/module.h>
 #include <linux/moduleparam.h>
 #include <linux/nmi.h>
+#include <linux/sched.h>
 
 #include <asm/system.h>
 #include <asm/uaccess.h>
@@ -156,7 +157,7 @@ static unsigned long *in_exception_stack
  * severe exception (double fault, nmi, stack fault, debug, mce) hardware stack
  */
 
-void show_trace(unsigned long *stack)
+void show_trace(struct task_struct *task, unsigned long *stack)
 {
 	unsigned long addr;
 	const unsigned cpu = safe_smp_processor_id();
@@ -221,6 +222,7 @@ void show_trace(unsigned long *stack)
 	HANDLE_STACK (((long) stack & (THREAD_SIZE-1)) != 0);
 #undef HANDLE_STACK
 	printk("\n");
+	print_preempt_trace(task, task->thread_info->preempt_count);
 }
 
 void show_stack(struct task_struct *tsk, unsigned long * rsp)
@@ -257,7 +259,7 @@ void show_stack(struct task_struct *tsk,
 		printk("%016lx ", *stack++);
 		touch_nmi_watchdog();
 	}
-	show_trace((unsigned long *)rsp);
+	show_trace(tsk, (unsigned long *)rsp);
 }
 
 /*
@@ -266,7 +268,7 @@ void show_stack(struct task_struct *tsk,
 void dump_stack(void)
 {
 	unsigned long dummy;
-	show_trace(&dummy);
+	show_trace(current, &dummy);
 }
 
 EXPORT_SYMBOL(dump_stack);
include/asm-x86_64/proto.h +1 -1
Index: linux-preempt-trace/include/asm-x86_64/proto.h
===================================================================
@@ -66,7 +66,7 @@ extern unsigned long end_pfn_map; 
 
 extern cpumask_t cpu_initialized;
 
-extern void show_trace(unsigned long * rsp);
+extern void show_trace(struct task_struct *task, unsigned long *rsp);
 extern void show_registers(struct pt_regs *regs);
 
 extern void exception_table_check(void);
include/linux/sched.h +13 -0
Index: linux-preempt-trace/include/linux/sched.h
===================================================================
@@ -592,6 +592,14 @@ extern int groups_search(struct group_in
 #define GROUP_AT(gi, i) \
     ((gi)->blocks[(i)/NGROUPS_PER_BLOCK][(i)%NGROUPS_PER_BLOCK])
 
+#ifdef CONFIG_DEBUG_PREEMPT
+# define MAX_PREEMPT_TRACE 25
+extern void print_preempt_trace(struct task_struct *task, u32 count);
+#else
+static inline void print_preempt_trace(struct task_struct *task, u32 count)
+{
+}
+#endif
 
 struct audit_context;		/* See audit.c */
 struct mempolicy;
@@ -770,6 +778,11 @@ struct task_struct {
 	int cpuset_mems_generation;
 #endif
 	atomic_t fs_excl;	/* holding fs exclusive resources */
+
+#ifdef CONFIG_DEBUG_PREEMPT
+	void *preempt_off_caller[MAX_PREEMPT_TRACE];
+	void *preempt_off_parent[MAX_PREEMPT_TRACE];
+#endif
 };
 
 static inline pid_t process_group(struct task_struct *tsk)
kernel/exit.c +5 -4
Index: linux-preempt-trace/kernel/exit.c
===================================================================
@@ -821,10 +821,11 @@ fastcall NORET_TYPE void do_exit(long co
  	tsk->it_prof_expires = cputime_zero;
 	tsk->it_sched_expires = 0;
 
-	if (unlikely(in_atomic()))
-		printk(KERN_INFO "note: %s[%d] exited with preempt_count %d\n",
-				current->comm, current->pid,
-				preempt_count());
+	if (unlikely(in_atomic())) {
+		printk(KERN_ERR "BUG: %s[%d] exited with nonzero preempt_count %d!\n",
+				tsk->comm, tsk->pid, preempt_count());
+		print_preempt_trace(tsk, preempt_count());
+	}
 
 	acct_update_integrals(tsk);
 	update_mem_hiwater(tsk);
kernel/irq/handle.c +17 -0
Index: linux-preempt-trace/kernel/irq/handle.c
===================================================================
@@ -85,7 +85,24 @@ fastcall int handle_IRQ_event(unsigned i
 		local_irq_enable();
 
 	do {
+#ifdef CONFIG_DEBUG_PREEMPT
+		u32 in_count = preempt_count(), out_count;
+#endif
 		ret = action->handler(irq, action->dev_id, regs);
+#ifdef CONFIG_DEBUG_PREEMPT
+		out_count = preempt_count();
+		if (in_count != out_count) {
+			printk(KERN_ERR "BUG: irq %d [%s] preempt-count "
+				"imbalance: in=%08x, out=%08x!\n",
+				irq, action->name, in_count, out_count);
+			print_preempt_trace(current, out_count);
+			/*
+			 * We already printed all the useful info,
+			 * fix up the preemption count now:
+			 */
+			preempt_count() = in_count;
+		}
+#endif
 		if (ret == IRQ_HANDLED)
 			status |= action->flags;
 		retval |= ret;
kernel/sched.c +1 -32
Index: linux-preempt-trace/kernel/sched.c
===================================================================
@@ -47,6 +47,7 @@
 #include <linux/syscalls.h>
 #include <linux/times.h>
 #include <linux/acct.h>
+#include <linux/kallsyms.h>
 #include <asm/tlb.h>
 
 #include <asm/unistd.h>
@@ -2707,38 +2708,6 @@ static inline int dependent_sleeper(int 
 }
 #endif
 
-#if defined(CONFIG_PREEMPT) && defined(CONFIG_DEBUG_PREEMPT)
-
-void fastcall add_preempt_count(int val)
-{
-	/*
-	 * Underflow?
-	 */
-	BUG_ON((preempt_count() < 0));
-	preempt_count() += val;
-	/*
-	 * Spinlock count overflowing soon?
-	 */
-	BUG_ON((preempt_count() & PREEMPT_MASK) >= PREEMPT_MASK-10);
-}
-EXPORT_SYMBOL(add_preempt_count);
-
-void fastcall sub_preempt_count(int val)
-{
-	/*
-	 * Underflow?
-	 */
-	BUG_ON(val > preempt_count());
-	/*
-	 * Is the spinlock portion underflowing?
-	 */
-	BUG_ON((val < PREEMPT_MASK) && !(preempt_count() & PREEMPT_MASK));
-	preempt_count() -= val;
-}
-EXPORT_SYMBOL(sub_preempt_count);
-
-#endif
-
 /*
  * schedule() is the main scheduler function.
  */
kernel/softirq.c +16 -0
Index: linux-preempt-trace/kernel/softirq.c
===================================================================
@@ -92,7 +92,23 @@ restart:
 
 	do {
 		if (pending & 1) {
+#ifdef CONFIG_DEBUG_PREEMPT
+			u32 in_count = preempt_count(), out_count;
+#endif
 			h->action(h);
+#ifdef CONFIG_DEBUG_PREEMPT
+			out_count = preempt_count();
+			if (in_count != out_count) {
+				printk(KERN_ERR "BUG: softirq %ld preempt-count "
+					"imbalance: in=%08x, out=%08x!\n",
+					h - softirq_vec, in_count, out_count);
+				print_preempt_trace(current, out_count);
+				/*
+				 * Fix up the bad preemption count:
+				 */
+				preempt_count() = in_count;
+			}
+#endif
 			rcu_bh_qsctr_inc(cpu);
 		}
 		h++;
kernel/timer.c +24 -11
Index: linux-preempt-trace/kernel/timer.c
===================================================================
@@ -33,6 +33,7 @@
 #include <linux/posix-timers.h>
 #include <linux/cpu.h>
 #include <linux/syscalls.h>
+#include <linux/kallsyms.h>
 
 #include <asm/uaccess.h>
 #include <asm/unistd.h>
@@ -480,6 +481,7 @@ static inline void __run_timers(tvec_bas
 		while (!list_empty(head)) {
 			void (*fn)(unsigned long);
 			unsigned long data;
+			int in_count, out_count;
 
 			timer = list_entry(head->next,struct timer_list,entry);
  			fn = timer->function;
@@ -488,17 +490,20 @@ static inline void __run_timers(tvec_bas
 			set_running_timer(base, timer);
 			detach_timer(timer, 1);
 			spin_unlock_irq(&base->t_base.lock);
-			{
-				int preempt_count = preempt_count();
-				fn(data);
-				if (preempt_count != preempt_count()) {
-					printk(KERN_WARNING "huh, entered %p "
-					       "with preempt_count %08x, exited"
-					       " with %08x?\n",
-					       fn, preempt_count,
-					       preempt_count());
-					BUG();
-				}
+
+			in_count = preempt_count();
+			fn(data);
+			out_count = preempt_count();
+			if (in_count != out_count) {
+				print_symbol(KERN_ERR "BUG: %s", (long)fn);
+				printk(KERN_ERR "(%p) preempt-count imbalance: "
+					"in=%08x, out=%08x!",
+					fn, in_count, out_count);
+				print_preempt_trace(current, out_count);
+				/*
+				 * Fix up the bad preemption count:
+				 */
+				preempt_count() = in_count;
 			}
 			spin_lock_irq(&base->t_base.lock);
 		}
@@ -914,6 +919,10 @@ static void run_timer_softirq(struct sof
 
 	if (time_after_eq(jiffies, base->timer_jiffies))
 		__run_timers(base);
+	if (panic_timeout == 2) {
+		panic_timeout = 0;
+		preempt_disable();
+	}
 }
 
 /*
@@ -922,6 +931,10 @@ static void run_timer_softirq(struct sof
 void run_local_timers(void)
 {
 	raise_softirq(TIMER_SOFTIRQ);
+	if (panic_timeout == 1) {
+		panic_timeout = 0;
+		preempt_disable();
+	}
 }
 
 /*
lib/Kconfig.debug +3 -0
Index: linux-preempt-trace/lib/Kconfig.debug
===================================================================
@@ -70,6 +70,9 @@ config DEBUG_PREEMPT
 	bool "Debug preemptible kernel"
 	depends on DEBUG_KERNEL && PREEMPT
 	default y
+	select FRAME_POINTER
+	select KALLSYMS
+	select KALLSYMS_ALL
 	help
 	  If you say Y here then the kernel will use a debug variant of the
 	  commonly used smp_processor_id() function and will print warnings
lib/Makefile +1 -1
Index: linux-preempt-trace/lib/Makefile
===================================================================
@@ -20,7 +20,7 @@ lib-$(CONFIG_RWSEM_GENERIC_SPINLOCK) += 
 lib-$(CONFIG_RWSEM_XCHGADD_ALGORITHM) += rwsem.o
 lib-$(CONFIG_GENERIC_FIND_NEXT_BIT) += find_next_bit.o
 obj-$(CONFIG_LOCK_KERNEL) += kernel_lock.o
-obj-$(CONFIG_DEBUG_PREEMPT) += smp_processor_id.o
+obj-$(CONFIG_DEBUG_PREEMPT) += smp_processor_id.o preempt.o
 
 ifneq ($(CONFIG_HAVE_DEC_LOCK),y) 
   lib-y += dec_and_lock.o
lib/preempt.c new file +101 -0

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