merging problems with Linus' kernel tree.
Dave Jones
Acked-by Eric BiedermanI did my morning 'git pull' on Linus' tree to a clean tree that I never make any commits to, and got this ...
$ git pull Unpacking 2425 objects 100% (2425/2425) done * refs/heads/origin: fast forward to branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 Auto-following refs/tags/v2.6.16-rc3 Auto-following refs/tags/v2.6.16-rc4 Unpacking 2 objects 100% (2/2) done * refs/tags/v2.6.16-rc4: storing tag 'v2.6.16-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 * refs/tags/v2.6.16-rc3: storing tag 'v2.6.16-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 Updating from 418aade459f03318defd18ef0b11981a63bd81b0 to 5914811acf36c3ff091f860a6964808f668f27d0. Documentation/cpu-hotplug.txt: needs update fatal: Entry 'Documentation/cpu-hotplug.txt' would be overwritten by merge. Cannot merge.
$ git-fsck-objects dangling commit 5914811acf36c3ff091f860a6964808f668f27d0
$ git-cat-file commit 5914811acf36c3ff091f860a6964 808f668f27d0 tree 04317a64fa5e76a13f29de655fe354abd627445d parent 6d7b9efacba9f4e5f4d5ca165b1a4350da52ddd7 author Bj�rn Steinbrink <[email protected]> 1140282763 +0100 committer Linus Torvalds <[email protected]> 1140496058 -0800
[PATCH] kjournald keeps reference to namespace
In daemonize() a new thread gets cleaned up and 'merged' with init_task. The current fs_struct is handled there, but not the current namespace.
This adds the namespace part.
[ Eric Biederman pointed out the namespace wrappers, and also notes that we can't ever count on using our parents namespace because we already have called exit_fs(), which is the only way to the namespace from a process. ]
I ran a fsck on the disk, and that turned up nothing, so I'm not expecting any local fs corruption.
What's up with this, and how do I fix it?
Dave
Quoted 3 lines · Dave Jones
Documentation/cpu-hotplug.txt: needs update
fatal: Entry 'Documentation/cpu-hotplug.txt' would be overwritten by merge. Cannot merge.
This means that it's dirty in the index, not that you've committed any changes.
Do a "git diff".
(It may also be that the diff is empty, and only shows the filename. That means that you've changed the mtime - for example edited it, and then undone the edit - so that the file is dirty in the index, even if the _contents_ are the same. If so, do a "git-update-index --refresh" or similar, or just ask for "git status", which will do it for you as part of checking the status of all your files).
Linus
Quoted 11 lines · Linus Torvalds
Quoted 3 lines · Dave Jones
Documentation/cpu-hotplug.txt: needs update
fatal: Entry 'Documentation/cpu-hotplug.txt' would be overwritten by merge. Cannot merge.This means that it's dirty in the index, not that you've committed any changes.
Do a "git diff".
For some reason, that shows that file being deleted.
Documentation/cpu-hotplug.txt deleted +0 -0
@@ -1,373 +0,0 @@
...
Quoted 3 lines
(It may also be that the diff is empty, and only shows the filename. That means that you've changed the mtime - for example edited it, and then undone the edit
Hmm, this tree is on NFS. The server was 2-3 seconds ahead of the client
(for some reason ntp wasn't running), but I wouldn't expect such chaos to ensue from this?
Quoted 4 lines
- so that the file is dirty in the index, even if the _contents_ are the same. If so, do a "git-update-index --refresh" or similar, or just ask for "git status", which will do it for you as part of checking the status of all your files).
Hmm. git status shows a ton of modified files, that I know I've never touched. (arch/frv is somewhere I'd rather not venture)
#
# Updated but not checked in:
# (will commit)
#
# modified: Documentation/cpu-hotplug.txt # new file: Documentation/fujitsu/frv/kernel-ABI.txt # modified: Documentation/hwmon/w83627hf # modified: Documentation/kernel-parameters.txt # modified: Documentation/kprobes.txt # modified: Documentation/mips/AU1xxx_IDE.README # modified: Documentation/powerpc/booting-without-of.txt # modified: Documentation/scsi/ChangeLog.megaraid_sas # modified: MAINTAINERS # modified: Makefile # modified: arch/arm/kernel/calls.S # modified: arch/arm/kernel/setup.c # modified: arch/arm/kernel/smp.c # modified: arch/arm/kernel/sys_oabi-compat.c # modified: arch/arm/mach-integrator/platsmp.c # modified: arch/arm/mach-iop3xx/iop321-setup.c # modified: arch/arm/mach-iop3xx/iop331-setup.c # modified: arch/arm/mach-ixp4xx/nslu2-setup.c # modified: arch/arm/mach-realview/platsmp.c # modified: arch/arm/mach-s3c2410/mach-h1940.c # new file: arch/arm/mach-s3c2410/s3c2400.h # modified: arch/arm/plat-omap/pm.c # modified: arch/frv/Kconfig # modified: arch/frv/Makefile # modified: arch/frv/kernel/break.S # modified: arch/frv/kernel/entry-table.S # modified: arch/frv/kernel/entry.S # modified: arch/frv/kernel/head.S # modified: arch/frv/kernel/irq.c # modified: arch/frv/mm/kmap.c # modified: arch/h8300/Kconfig # modified: arch/h8300/Kconfig.cpu # new file: arch/i386/boot/.gitignore # new file: arch/i386/boot/tools/.gitignore # new file: arch/i386/kernel/.gitignore # modified: arch/i386/kernel/cpu/transmeta.c # modified: arch/i386/kernel/head.S # modified: arch/i386/kernel/syscall_table.S # modified: arch/i386/kernel/timers/timer_tsc.c # modified: arch/i386/kernel/vsyscall-sysenter.S # modified: arch/i386/oprofile/backtrace.c # modified: arch/ia64/kernel/acpi.c # modified: arch/ia64/kernel/entry.S # modified: arch/ia64/kernel/ia64_ksyms.c # modified: arch/ia64/kernel/setup.c # modified: arch/ia64/kernel/smpboot.c # modified: arch/ia64/kernel/time.c # modified: arch/ia64/kernel/traps.c # modified: arch/ia64/sn/kernel/io_init.c # modified: arch/ia64/sn/kernel/setup.c # modified: arch/ia64/sn/kernel/sn2/prominfo_proc.c # modified: arch/ia64/sn/kernel/sn2/sn2_smp.c # modified: arch/ia64/sn/kernel/sn2/sn_proc_fs.c # modified: arch/ia64/sn/kernel/sn2/timer.c # modified: arch/ia64/sn/kernel/sn2/timer_interrupt.c # modified: arch/ia64/sn/kernel/tiocx.c # modified: arch/ia64/sn/kernel/xpc_channel.c # modified: arch/ia64/sn/kernel/xpc_main.c # modified: arch/ia64/sn/pci/pci_dma.c # modified: arch/ia64/sn/pci/pcibr/pcibr_ate.c # modified: arch/ia64/sn/pci/pcibr/pcibr_dma.c # modified: arch/ia64/sn/pci/pcibr/pcibr_provider.c # modified: arch/m68k/Kconfig # modified: arch/m68k/fpsp040/bindec.S # modified: arch/m68k/fpsp040/binstr.S # modified: arch/m68k/fpsp040/bugfix.S # modified: arch/m68k/fpsp040/decbin.S # modified: arch/m68k/fpsp040/do_func.S # modified: arch/m68k/fpsp040/fpsp.h # modified: arch/m68k/fpsp040/gen_except.S # modified: arch/m68k/fpsp040/get_op.S # modified: arch/m68k/fpsp040/kernel_ex.S # modified: arch/m68k/fpsp040/res_func.S # modified: arch/m68k/fpsp040/round.S # 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modified: arch/s390/kernel/machine_kexec.c # modified: arch/s390/kernel/process.c # modified: arch/s390/kernel/setup.c # modified: arch/s390/kernel/smp.c # modified: arch/s390/kernel/syscalls.S # modified: arch/s390/lib/delay.c # modified: arch/sh/Kconfig # modified: arch/sparc/kernel/systbls.S # modified: arch/sparc64/kernel/sys_sparc32.c # modified: arch/sparc64/kernel/systbls.S # modified: arch/v850/Kconfig # modified: arch/x86_64/defconfig # modified: arch/x86_64/ia32/ia32entry.S # modified: arch/x86_64/ia32/sys_ia32.c # modified: arch/x86_64/kernel/apic.c # modified: arch/x86_64/kernel/entry.S # modified: arch/x86_64/kernel/head.S # modified: arch/x86_64/kernel/io_apic.c # modified: arch/x86_64/kernel/mpparse.c # modified: arch/x86_64/kernel/nmi.c # modified: arch/x86_64/kernel/pci-gart.c # modified: arch/x86_64/kernel/time.c # modified: arch/x86_64/kernel/traps.c # modified: arch/x86_64/mm/k8topology.c # modified: arch/x86_64/mm/numa.c # modified: arch/x86_64/mm/srat.c # modified: drivers/acpi/resources/rscalc.c # 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modified: drivers/scsi/sym53c8xx_2/sym_hipd.c # modified: drivers/serial/8250.c # modified: drivers/serial/Kconfig # modified: drivers/serial/ioc4_serial.c # modified: drivers/usb/host/pci-quirks.c # modified: drivers/usb/host/sl811_cs.c # modified: drivers/usb/input/hid-core.c # modified: drivers/usb/misc/Kconfig # modified: drivers/usb/misc/ldusb.c # modified: drivers/usb/serial/pl2303.c # modified: drivers/usb/serial/pl2303.h # modified: drivers/usb/storage/unusual_devs.h # modified: drivers/video/Kconfig # modified: drivers/video/fbmem.c # modified: drivers/video/gbefb.c # modified: drivers/video/neofb.c # modified: drivers/video/nvidia/nvidia.c # modified: drivers/video/s3c2410fb.c # modified: fs/cifs/file.c # modified: fs/compat.c # modified: fs/exec.c # modified: fs/ext2/xattr.c # modified: fs/fuse/dev.c # modified: fs/fuse/file.c # modified: fs/jbd/checkpoint.c # modified: fs/jbd/commit.c # modified: fs/lockd/clntlock.c # modified: fs/lockd/svc4proc.c # modified: fs/lockd/svcproc.c # 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modified: include/asm-i386/mman.h # modified: include/asm-i386/thread_info.h # modified: include/asm-i386/topology.h # modified: include/asm-i386/unistd.h # modified: include/asm-ia64/acpi.h # modified: include/asm-ia64/machvec_sn2.h # modified: include/asm-ia64/mman.h # modified: include/asm-ia64/sn/arch.h # modified: include/asm-ia64/sn/bte.h # modified: include/asm-ia64/sn/pcibr_provider.h # modified: include/asm-ia64/sn/sn_feature_sets.h # modified: include/asm-ia64/sn/xpc.h # modified: include/asm-ia64/timex.h # modified: include/asm-m32r/mman.h # modified: include/asm-m68k/mman.h # modified: include/asm-mips/cpu.h # deleted: include/asm-mips/gcc/sgidefs.h # modified: include/asm-mips/mach-generic/timex.h # new file: include/asm-mips/mach-rm200/timex.h # modified: include/asm-mips/mman.h # modified: include/asm-mips/r4kcache.h # modified: include/asm-mips/uaccess.h # modified: include/asm-mips/unistd.h # modified: include/asm-parisc/mman.h # modified: include/asm-powerpc/mman.h # 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modified: net/bluetooth/rfcomm/core.c # modified: net/bridge/br_netfilter.c # modified: net/bridge/br_stp_if.c # modified: net/core/datagram.c # modified: net/ipv4/icmp.c # modified: net/ipv4/ip_gre.c # modified: net/ipv4/ip_output.c # modified: net/ipv4/ipip.c # modified: net/ipv4/netfilter.c # modified: net/ipv4/netfilter/ip_nat_standalone.c # modified: net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c # modified: net/ipv4/xfrm4_output.c # modified: net/ipv6/icmp.c # modified: net/ipv6/netfilter/ip6t_REJECT.c # modified: net/ipv6/raw.c # modified: net/netfilter/Kconfig # modified: net/netfilter/nf_conntrack_core.c # modified: net/netfilter/nf_conntrack_proto_tcp.c # modified: net/netfilter/nf_conntrack_proto_udp.c # modified: net/netlink/genetlink.c # modified: net/xfrm/xfrm_policy.c
#
#
# Changed but not updated:
# (use git-update-index to mark for commit)
#
# deleted: Documentation/cpu-hotplug.txt
#
Spooky. I'm seriously questioning myself whether or not I have done something to this tree, but I'm 99.999% sure it's unmodified (by me at least).
git diff on any of the modified files shows no output, which could be explained by your modified timestamp theory, but how about the deleted/new files ?
Dave
Documentation/cpu-hotplug.txt
Quoted 9 lines · Dave Jones
For some reason, that shows that file being deleted.
Documentation/cpu-hotplug.txt deleted +0
-0@@ -1,373 +0,0 @@
If that file didn't exist in your index, "git diff" wouldn't even show it. So it exists in your index, but not in your working tree.
Quoted 3 lines
Hmm, this tree is on NFS. The server was 2-3 seconds ahead of the client
(for some reason ntp wasn't running), but I wouldn't expect such chaos to ensue from this?
No, that won't matter. git shouldn't ever look at the current time (well, except when it creates a new commit object, of course), just the normal file time, which will be determined by the server.
Quoted 2 lines
Hmm. git status shows a ton of modified files, that I know I've never touched. (
arch/frvis somewhere I'd rather not venture)
Sounds like you might have had a partial merge at some point that you ^C'd or that just failed, and you did "git reset" on it without the "--hard" flag?
Quoted 7 lines
Spooky. I'm seriously questioning myself whether or not I have done something to this tree, but I'm 99.999% sure it's unmodified (by me at least).
git diff on any of the modified files shows no output, which could be explained by your modified timestamp theory, but how about the deleted/new files ?
Those really are different in the working tree than the index (or the git
tree: the difference between "git diff" and "git diff HEAD" - and "git status" does both - is obviously what you compare to).
Since it's in the "will commit" section, it means that it's in your index but not in your HEAD tree. Which in turn implies that your index seems to not actually match your HEAD.
That, in turn, is usually due to an aborted merge.
Do a "git checkout -f".
Linus
Quoted 1 line · Linus Torvalds
That, in turn, is usually due to an aborted merge.
Hmm. (Recalls a power outage a few days ago).
I'll bet that's when it happened.
Quoted 1 line
Do a "git checkout -f".
Fixed, thanks.
Dave