Oops in 2.6.10-rc1

[repost to alsa-devel as suggested by lkml]

hi,

yesterday i was updating to recent 2.6.10-rc1-BK and booting gives:

Unable to handle kernel NULL pointer dereference at virtual address 00000000
 printing eip:
dfc10ce0
*pde = 00000000
Oops: 0000 [#1]
PREEMPT
Modules linked in: snd_ens1371 snd_rawmidi snd_ac97_codec snd_pcm
snd_timer snd soundcore snd_page_alloc rtc
CPU:    0
EIP:    0060:[<dfc10ce0>]    Not tainted VLI
EFLAGS: 00010282   (2.6.10-rc1)

EIP is at 0xdfc10ce0
eax: 00000000 ebx: dff1f800 ecx: dfc10ce0 edx: dff1f9c4
esi: ffffffed edi: dff1f800 ebp: dff1f800 esp: de613e50
ds: 007b es: 007b ss: 0068
Process modprobe (pid: 186, threadinfo=de612000 task=deb5e5a0)

Stack: c01fc7b8 dff1f800 000007ff dff1f800 c01fc7ef dff1f800 000007ff dfc1e400
       e082729d dff1f800 dfc1e400 00000000 e08469cf dfc1e400 000001f8 
000000d0
       c01667f7 de36da8c c0171759 dffe79e0 dfc1e400 ffffffed dff1f800 
dff1f800
Call Trace:
 [<c01fc7b8>] pci_enable_device_bars+0x28/0x40
 [<c01fc7ef>] pci_enable_device+0x1f/0x40
 [<e082729d>] snd_ensoniq_create+0x1d/0x480 [snd_ens1371]
 [<e08469cf>] snd_card_new+0x1cf/0x2c0 [snd]
 [<c01667f7>] __lookup_hash+0xa7/0xe0
 [<c0171759>] alloc_inode+0x129/0x150
 [<e0827867>] snd_audiopci_probe+0x87/0x1e0 [snd_ens1371]
 [<c016f6c2>] dput+0x92/0x250
 [<c01fd202>] pci_device_probe_static+0x52/0x70
 [<c01fd24c>] __pci_device_probe+0x2c/0x30
 [<c01fd27c>] pci_device_probe+0x2c/0x60
 [<c025adff>] bus_match+0x3f/0x80
 [<c025af52>] driver_attach+0x52/0xa0
 [<c025b478>] bus_add_driver+0x98/0xe0
 [<c025ba8f>] driver_register+0x2f/0x40
 [<c01fd530>] pci_register_driver+0x40/0x50
 [<e08279cf>] alsa_card_ens137x_init+0xf/0x13 [snd_ens1371]
 [<c01341ba>] sys_init_module+0x18a/0x270
 [<c01041fb>] syscall_call+0x7/0xb
Code: 5f 64 65 76 38 62 00 00 00 00 00 00 00 00 00 02 00 00 00 88 0c c1 df

08 0d c1 df 10 fa 3a c0 00 fa 3a c0 00 00 00 00 6c 5a c1 df <0a> 00 00 00 36 46 37 46 00 00 00 00 f0 0c c1 df 69 6e 74 31 33

full dmesg output here:
www.nerdbynature.de/bits/prinz/2.6.10-rc1/dmesg.txt

updating to an even more recent (read: updated now) does not help and the problem is really triggered when loading snd_ens1371. well, the only "problem" is the oops and i have no sound :-(

just strange that nobody else cries out loud. or am i just lacking enough information? ok, this is debian/unstable (i386), gcc3.4.2, libc2.3.2, pls tell me if you need more information.

thank you,
Christian.

BOFH excuse #374:

It's the InterNIC's fault.


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It's a bit dead-lock, because we cannot help you. It seems that the pci structure passed to our code is broken. The driver has had no changes in initialization for a long time.

Jaroslav

-----
Jaroslav Kysela <[email protected]>
Linux Kernel Sound Maintainer
ALSA Project, SUSE Labs

so, it's a kernel problem again, not related to the alsa framework?

i see in

http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.10-rc1

[...]
<[email protected]>
[PATCH] i386/io_apic init section fixups

<[email protected]>
[PATCH] vm: convert users of remap_page_range() under sound/ to use remap_pfn_range()
[...]

so i'll revert the patches and see what it gives.

thank you,
Christian

BOFH excuse #131:

telnet: Unable to connect to remote host: Connection refused

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hm,

still no sound with snd_ens1371 but now i spend some time to find out how to revert a patch with bk. while compiling is still ongoing, let me tell you how i tried to revert the patch with bk, because i am not entirely sure if i do the right thing here:

bk changes > ../changes-04-11-2004.txt

as written before, i suspect (!) two changes here:

in ../changes-04-11-2004.txt i found out the ChnageSet numbers:
1.1988.72.76 + 1.2000.5.77. then i did

bk undo -a1.1988.72.76

only to find out that i misread the manual and 1.1988.72.76 is still in place. i did

bk changes > ../changes-1.1988.72.76.txt

and the very patch has a different ChangeSet now: 1.2202. so i did

bk undo -a1.2201

is this the right way to revert patches when subsequent patches might not allow to simply "bk undo -r<vers>" (because subsequent patches rely on this single ChangeSet).

thank you for your assistance,
Christian
- --
BOFH excuse #182:

endothermal recalibration
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=sm2q
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Hash: SHA1

hi again,

i *think* i found the ChangeSet leading to the bug i tried to report in
http://marc.theaimsgroup.com/?l=linux-kernel&m=109888178603516&w=2

the error is sill present here (and only here? strange...), the latest -BK does not fix it. i had some difficulties in telling BK to do the right thing. to summarise the error:

- - upon loading of snd_ens1371 the Oops occurs. system is still stable then, but no sound available.
- - this occured somewhere between 2.6.9 (released 15-Oct-2004) and 2.6.9-10 (released 22-Oct-2004)

one interesting changeset was:

[email protected], 2004-10-20 20:33:06+02:00, [email protected]
Merge suse.cz:/home/perex/bk/linux-sound/linux-2.5 into suse.cz:/home/perex/bk/linux-sound/linux-sound

i tried to back it out:

$ bk clone -r1.2000.7.1 linux-2.6-BK linux-2.6-BK-test

but the said ChangeSet was still there (of course). i tried to back it out (now for sure):

$ bk undo -a1.2010
(hm: the changesets get renumbered everytime i "do" something with the
tree) this one reverted quite a few ChangeSets but i let it happen.

compiling & booting this thing goes fine and i am now running 2,6,9-BK(?) with working snd_ens1371.

if someone could give me a hint here what to do next or perhaps tell me that the whole things was totally pointless - please say so. i am somehow lost as to which is the right person to bug here.

thank you for your time,
Christian.
- --
BOFH excuse #328:

Fiber optics caused gas main leak
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=8VM9
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I use snd_ens1371 and linux-2.6.10-rc1 and works ....

Josep

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-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

hi again,

i *think* i found the ChangeSet leading to the bug i tried to report in
http://marc.theaimsgroup.com/?l=linux-kernel&m=109888178603516&w=2

the error is sill present here (and only here? strange...), the latest -BK does not fix it. i had some difficulties in telling BK to do the right thing. to summarise the error:

- - upon loading of snd_ens1371 the Oops occurs. system is still stable then, but no sound available.
- - this occured somewhere between 2.6.9 (released 15-Oct-2004) and 2.6.9-10 (released 22-Oct-2004)

one interesting changeset was:

[email protected], 2004-10-20 20:33:06+02:00, [email protected]
Merge suse.cz:/home/perex/bk/linux-sound/linux-2.5 into suse.cz:/home/perex/bk/linux-sound/linux-sound

i tried to back it out:

$ bk clone -r1.2000.7.1 linux-2.6-BK linux-2.6-BK-test

but the said ChangeSet was still there (of course). i tried to back it out (now for sure):

$ bk undo -a1.2010
(hm: the changesets get renumbered everytime i "do" something with the
tree) this one reverted quite a few ChangeSets but i let it happen.

compiling & booting this thing goes fine and i am now running 2,6,9-BK(?) with working snd_ens1371.

if someone could give me a hint here what to do next or perhaps tell me that the whole things was totally pointless - please say so. i am somehow lost as to which is the right person to bug here.

thank you for your time,
Christian.
- --
BOFH excuse #328:

Fiber optics caused gas main leak
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Since you seem to be a BK user, try doing a

bk revtool sound/pci/ens1370.c

and see if you can find the change that caused your problem. Of course, the real change might be somewhere else in the sound driver initialization path, so it's not like just that one file might be the cause. Regardöess, the more you can pinpoint when the problem started, the better.

Also, if you enable frame pointers (under kernel debugging), the traceback will look a bit better. As it is, your oops looks looks like something has jumped off into la-la-land by jumping through a bad pointer (the value is still in %ecx), but it's definitely not clear _where_ that happened. Your trace points to pci_enable_device_bars(), but that may well be just stale stack contents.

Linus

On Sat, 6 Nov 2004 23:02:28 -0800 (PST), Linus Torvalds wrote

s/BK user/BK beginner/

hm, i already found the ChangeSet ([email protected]), but it seems the ChangeSets get renumbered when linux makes progress. the issuer of this changeset did not comment yet.

yes.

ah, ok, will do.

thank you for your time,
Christian.

BOFH excuse #206:

Police are examining all internet packets in the search for a
narco-net-trafficker

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Hash: SHA1

since i got this oops between 2.6.9 and 2.6.10-rc1 i am still assuming that the change was made somewere between 15-Oct-2004 (2.6.9) and 22-Oct-2004 (2.6.10-rc1). so the only Changeset matching this timespan is:

- -------------------------
[email protected], 2004-10-20 08:10:43-07:00, [email protected] [PATCH] module_param_array() should take a pointer

module_param_array() takes a variable to put the number of elements in. Looking through the uses, many people don't care, so they declare a dummy or share one variable between several parameters. The latter is problematic because sysfs uses that number to decide how many to display.

The solution is to change the variable arg to a pointer, and if the pointer is NULL, use the "max" value. This change is fairly small, but fixing up the callers is a lot of (trivial) churn.

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

http://www.nerdbynature.de/bits/prinz/2.6.10-rc1/dmesg-debug_oops.txt
http://www.nerdbynature.de/bits/prinz/2.6.10-rc1/config

the new config has this enabled:

CONFIG_DEBUG_DRIVER=y
CONFIG_DEBUG_INFO=y
CONFIG_DEBUG_KOBJECT=y
CONFIG_DEBUG_SLAB=y
CONFIG_DEBUG_SPINLOCK=y
CONFIG_FRAME_POINTER=y
CONFIG_KPROBES=y

shows the output of dmesg after doing "modprobe snd-ens1371". after this, snd-ens1371 seems to be loaded:

Module                  Size  Used by
snd_ens1371            29928  1
snd_rawmidi            25952  1 snd_ens1371
snd_ac97_codec         77856  1 snd_ens1371
snd_pcm               101768  2 snd_ens1371,snd_ac97_codec
snd_timer              31940  1 snd_pcm
snd                    51620  5
snd_ens1371,snd_rawmidi,snd_ac97_codec,snd_pcm,snd_timer
soundcore               9440  1 snd
snd_page_alloc          7620  1 snd_pcm
ipv6                  260480  8
psmouse                20424  0
rtc                    20188  0

but is not working and cannot be unloaded:

prinz:~$ rmmod snd_ens1371
ERROR: Module snd_ens1371 is in use

there was an answer from the alsa-devel folks here:
http://marc.theaimsgroup.com/?l=linux-kernel&m=109897024116288&w=2

"It's a bit dead-lock, because we cannot help you. It seems that the pci structure passed to our code is broken. The driver has had no changes in initialization for a long time."

i hope these information will help a bit. thank you for your assistance, i really appreciate it Christian

(still wondering why nobody else has this bug, 1370 is not *that* weird, i thought)

PS: if someone could explain me, why the ChangeSet numbers are always
different: i've used "bk revtool sound/pci/ens1370.c" to find out the changes for this file and the suspicious patch reads

     sound/pci/[email protected], 2004-10-20....

in "bk revtool". the changelog however reads:

     [email protected], 2004-10-20 08:10:43-07:00, [email protected]

- --
BOFH excuse #62:

need to wrap system in aluminum foil to fix problem -----BEGIN PGP SIGNATURE-----
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Not necessarily. The ALSA merge is the most likely reason for the oops, and since ALSA development does not merge with the kernel very often, it may be some much older change in the ALSA tree.

You can check the ALSA tree _before_ the merge, by doing (in the current tree):

	bk undo -a1.2000.7.2

which should give you a tree without any of "my" stuff, ie it was what Jaroslav was working on before he merged it into the standard tree.

(BK revision numbers change on merges, so the above number is not necessarily the right one unless you have the current -bk tree. It should have a changeset something like:

	[email protected], 2004-10-20 20:51:33+02:00, [email protected]
	  Merge suse.cz:/home/perex/bk/linux-sound/linux-sound
	  into suse.cz:/home/perex/bk/linux-sound/work

so that you can double-check).

Yup, it's a call through a bad pointer again, and again the EIP value can be found in %ecx. But the source of the bug is not clear. The stack trace implies "show_stack()", but that function doesn't do any indirect calls, so I suspect the frame pointer didn't help in this case.

And it's not "pci_enable_device()" either (which was there last time too), since that one calls "pci_enable_device_bars()" at the point it shows in the stack trace.

Quite frankly, it looks like something smashed the stack, and the fact that it happens _around_ when "pci_enable_device()" was called makes me seriously suspect the IRQ handler for the device. That's when IRQ routing is enabled, so often the interrupts start at that point. And since FRAME_POINTER didn't make the stack frame look sane, it's very possible that the bogus call isn't due to a real "call", but due to a return from a broken stack.

I seriously doubt that it's the PCI structure being broken. It's the ALSA merge, almost certainly - it's just that the stack is so confused that it's hard to tell where the bug has happened.

And I'll double-check the "regparm" changes, just in case. They change some irq calling conventions, although none of the involved stuff seems to be implied here.

A quick suggestion: make sure that there is not some stale object file lying around confusing things about memory layout, and do a "make clean" and make sure that all old modules are clean too and re-installed. The kernel dependencies should be correct, but even then there can be problems with clocks that are off a bit etc.

Yes, that makes me suspicious, and is one reason why I wonder if it's just your tree not being built right.

There are different revision numbers: there's the revision number for the _file_, and there is the revision number for the _change_.

Also, both (or one) of them can change when a merge occurs, since other people may have had different merge histories, and in a distributed environment the revision numbers are a lot more fluid than in CVS.

Linus

On Sun, 7 Nov 2004 08:57:40 -0800 (PST), Linus Torvalds wrote

yes, i already did so, i think:

http://marc.theaimsgroup.com/?l=linux-kernel&m=109979092216919&w=2

but i did it this way:
bk clone -r1.2000.7.1 linux-2.6-BK linux-2.6-BK-test bk undo -a1.2010

(probably wrong, so i'll repeat it as you suggeseted)

aha!

really: i always do "make clean", even "make mrproper" sometimes, just to be sure. and i am quite certain, that i did not forget to install the modules. but i'll keep my eyes open, yes.

i'm updating via "ntpdate" on every boot. i am even using a (faster) 2nd machine for my build and the bk things right now: building a current -bk on boths hosts gives me this error.

i'll build a -bk snapshot from a tar.bz2 later on and see what it gives.

aha. it was kinda confusing...now i got it, i think ;)

again: thank you for your time on this rainy weekend, Christian.

BOFH excuse #8:

static buildup

Hmm.. That may well have worked fine, but it sounds in that post like you tried to undo the ALSA stuff, and what I suggested was really to do the
reverse: take _only_ the ALSA changes, and then if it still fails, at least you have now pinpointed it a bit more (admittedly to the _likely_ source, but that's as it should be: you narrow down the "known bad" source base until you've narrowed it down to the smallest change you can find that causes the problem).

Sounds like you're doing everything right, but hey, it can't hurt to double-check.

Linus

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i did so from a current tree (bk pull, undo, -r get) and it's working fine (url wraps):

http://www.nerdbynature.de/bits/prinz/2.6.10-rc1/dmesg-no-oops-2.6.9_a1.2000.7.2.txt

so i can see with "bk changes" that the ChangeSet is still there. this is what i expected, because -a says:

- -a<rev> Remove all changesets which occurred after <rev>.

what i did not expect is that this ChangeSet is now *not* the culprit, because there is no oops. am i right? [1]

i've build from linux-2.6.10-rc1.tar.bz2 with patch-2.6.10-rc1-bk17.bz2 from kernel.org with the same .config and "modprobe snd-ens1371" oopses as expected :(

yes, i wanted to undo the alsa changes because i suspected the alsa framework (sorry guys) and wanted to see if it still oopses when the latest alsa patch was not appied.

i did another thing: i enabled the (deprecated) OSS driver (es1371.ko) tried to load this thing:

http://www.nerdbynature.de/bits/prinz/2.6.10-rc1/dmesg-debug_oops-OSS.txt

it oopses.
- - you said it's not a b0rken pci thingy
- - i have to assume now that it's not an ALSA issue (since oss oopses too)
- - it is OSS? the driver? i've CC'ed linux-sound...

yes, like Documentation/BUG-HUNTING says. but i seem to have difficulties in using my tools (bk). sorry for that.

yes, i really hope that it's not just a user error (on my side). building kernels since 2.0...but you never know...

thanks again for help,
Christian
(whose only wish these days is to get over this strange thing and not wasting peoples precious time with a "sound driver". hey, at least the box is booting...)

- --
BOFH excuse #224:

Jan  9 16:41:27 huber su: 'su root' succeeded for .... on /dev/pts/1

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=wb90
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Yes.

So now I'd like to know _where_ the culprit is, since it turned out to be not the ALSA code.

Sounds like something else changed, and likely the ALSA _and_ the OSS driver both broke. Which is not all that unlikely, since I suspect they share a lot of history.

Not your fault. Think of this as a learning experience ;)

Anyway, now that the _other_ driver also oopses, and with a very similar oops too, so it looks like they both depended on some undocumented (or changed) detail in the PCI layer. Next step would be to see if the thing that breaks is this merge:

	[email protected], 2004-11-04 17:07:16-08:00, [email protected]
	  Merge bk://kernel.bkbits.net/gregkh/linux/driver-2.6
	  into ppc970.osdl.org:/home/torvalds/v2.6/linux

which merges Greg's PCI/driver model changes.

It's all the same steps you took with the ALSA merge, you're a professional by now ;)

Greg, have you followed this thread?

Hey, sound is important. And especially if you somehow found something non-sound that just broke sound by mistake, all the more important to fix it.

Linus

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it definitely is, yes.

may i ask how you come to this conclusion? by technical knowledge or could this be deduced by some bk magic too?

i did "bk undo -a1.2463" from a current -BK tree and it oopses:

http://www.nerdbynature.de/bits/prinz/2.6.10-rc1/dmesg-debug_oops-a1.2463.txt

(i've booted with different boot options this time, because i noticed that i always booted with "acpi=force". changing this did not help either.)

next i wanted to do "bk undo -r1.2463" now to see if it does *not* break without this ChangeSet (because i already know it *breaks* with this ChangeSet) but that would leave some parentless child deltas. i read in the BK docs that "bk cset -x<version>" would help here. but "bk cset
- -x1.2463" aborts:

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

evil@atlant:~/kernel/linux-2.6-BK$ bk changes | head -n3
[email protected], 2004-11-04 17:07:16-08:00, [email protected]
  Merge bk://kernel.bkbits.net/gregkh/linux/driver-2.6
  into ppc970.osdl.org:/home/torvalds/v2.6/linux

evil@atlant:~/kernel/linux-2.6-BK$ bk cset -x1.2463
cset: Merge cset found in revision list: (1.2463).  Aborting. (cset1)
- ---------------------

i've put everthing on http://www.nerdbynature.de/bits/prinz/2.6.10-rc1/
the .configs, the oopses are there. i've double checked a kernel built from "bk -a a1.2000.7.2" yesterday but the result was the same (no oops)

thank you,
Christian.
- --
BOFH excuse #121:

halon system went off and killed the operators. -----BEGIN PGP SIGNATURE-----
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No, just gut feel. If the pre-merge ALSA works, and the post-merge one doesn't, and the oops in both cases happen somewhere close to where it does "pci_enable_device()", there's not a lot left. There are interrupts, and there is the PCI layer...

Note that "bk undo -axxx" will _leave_ xxx in place, and undo everything after.

So what you did still has the merge in the tree, and that it still oopses is thus to be expected. BUT, we're getting closer.

"cset -x" only works on patches, not on complex operations. You still want "bk undo", but you want to use "bk revtool" to see what the merge point was, and tell _which_ of the merged top-of-trees you want to get to.

In other words, you can't just undo a merge, you need to tell which _way_ to undo it. See? It does actually make sense, and "bk revtool" will show you the relationships of merges (at least if the time range is big enough to show enough info).

Anyway, if you have the top-of-tree-is-1.2463, then go to "bk revtool", and select that node in the graph by clicking on it. Notice how those edges turned white, and you can now easily see which children were pre-merge.

In this case, the top-of-tree tree _without_ the PCI merge is 1.2642:

	[email protected], 2004-11-04 17:06:13-08:00, [email protected]
	  Merge bk://kernel.bkbits.net/gregkh/linux/usb-2.6
	  into ppc970.osdl.org:/home/torvalds/v2.6/linux

(you won't see it in "bk changes", since it's a trivial merge: use "bk changes -a" to see it). So just before I merged Greg's PCI changes, I merged his USB changes.

Now, that's fine - the USB merge is likely to be ok, so try doing

	bk undo -a1.2462

and you will now have a tree that is exactly the same as before, except it does _not_ have the PCI merge from Greg.

And if this one does not oops, you can now officially blame Greg.

Now, if you want to get _really_ fancy, you can now look at each changeset that differed, with something like

	bk set -n -d -r1.2462 -r1.2463 | bk -R prs -h -d'<:P:@:HOST:>\n$each(:C:){\t(:C:)\n}\n' -

which is black magic that does a set operation and shows all the changes in between the sets of "bk at 1.2462" and "bk at 1.2463".

(This is _not_ the same as "bk changes -r1.2462..1.2463", because that one just shows the single merge change that is on the direct _path_ from one changeset to another. The black magic thing shows the set difference of changesets that comes from the full graph at two points).

Then you can look at each change individually and see if they matter.

And once you can do the set operations, you're officially a BK poweruser. Me, I just have a script, I'm a BK dabbler.

Looking at the list (appended), I don't see anything obvious, but hey, if it was obvious it wouldn't have been merged in the first place.

Thanks for your willingness to pursue this thing,

Linus

-----
<[email protected]>
[PATCH] sysfs: fix sysfs backing store error path confusion

o sysfs_new_dirent to retrun 0 if kmalloc fails. Thanks to Milton Miller for spotting this.

<[email protected]>
[PATCH] small sysfs cleanups

The patch below does the following cleanups for the sysfs code:
- remove the unused global function sysfs_mknod
- make some structs and functions static

Please check whether this patch is correct, or whether some of the things I made static should be used globally in the forseeable future.

<[email protected]>
[PATCH] add the physical device and the bus to the hotplug environment

Add the sysfs path of the physical device to the hotplug event of class and block devices. This should solve the userspace issue not to know if the device is a virtual one and the "device" symlink will never be created, but we sit there and wait for it to show up not knowing when we should give up.

Also the bus name is added to the hotplug event, so we don't need to reverse lookup in the /sys/bus/* directory which bus our physical device belongs to. This is e.g. the value matched against the BUS= key, that may be used in an udev rule.

This is a PCI network card:
ACTION=add
SUBSYSTEM=net
DEVPATH=/class/net/eth0 PHYSDEVPATH=/devices/pci0000:00/0000:00:1e.0/0000:02:01.0 PHYSDEVBUS=pci
INTERFACE=eth0
SEQNUM=827
PATH=/sbin:/bin:/usr/sbin:/usr/bin
HOME=/

This is a IDE CDROM:
ACTION=add
SUBSYSTEM=block
DEVPATH=/block/hdc PHYSDEVPATH=/devices/pci0000:00/0000:00:1f.1/ide1/1.0 PHYSDEVBUS=ide
SEQNUM=1017 PATH=/sbin:/bin:/usr/sbin:/usr/bin
HOME=/

This is an USB-stick partition:
ACTION=add
SUBSYSTEM=block
DEVPATH=/block/sda/sda1 PHYSDEVPATH=/devices/pci0000:00/0000:00:1d.1/usb3/3-1/3-1:1.0/host1/target1:0:0/1:0:0:0 PHYSDEVBUS=scsi
SEQNUM=1032
PATH=/sbin:/bin:/usr/sbin:/usr/bin
HOME=/

<[email protected]>
[PATCH] driver-model: comment fix in bus.c

df_01_driver_attach_comment_fix.patch

bus_match() was renamed to driver_probe_device() but the comment for device_attach() wasn't updated. This patch updates it.

<[email protected]>
[PATCH] driver-model: bus_recan_devices() locking fix

df_02_bus_rescan_devcies_fix.patch

bus_rescan_devices() eventually calls device_attach() and thus
requires write locking the corresponding bus. The original code just called bus_for_each_dev() which only read locks the bus. This patch separates __bus_for_each_dev() and __bus_for_each_drv(), which don't do locking themselves, out from the original functions and call them with read lock in the original functions and with write lock in bus_rescan_devices().

<[email protected]>
[PATCH] driver-model: sysfs_release() dangling pointer reference fix

df_03_sysfs_release_fix.patch

Some attributes are allocated dynamically (e.g. module and device parameters) and are usually deallocated when the assoicated kobject is released. So, it's not safe to access attr after putting the kobject.

<[email protected]>
[PATCH] driver-model: kobject_add() error path reference counting fix

df_04_kobject_add_ref_fix.patch

In kobject_add(), @kobj wasn't put'd properly on error path. This patch fixes it.

<[email protected]>
[PATCH] driver-model: device_add() error path reference counting fix

df_05_device_add_ref_fix.patch

In device_add(), @dev wan't put'd properly when it has zero length
bus_id (error path). Fixed.

<[email protected]>
kevent: fix build error if CONFIG_KOBJECT_UEVENT is not selected.

Thanks to Serge Hallyn <[email protected]> for pointing this out.

<[email protected]>
[PATCH] kobject_uevent: fix init ordering

Looks like kobject_uevent_init is executed before netlink_proto_init and consequently always fails. Not cool.

Attached patch switches the initialization over from core_initcall (init level 1) to postcore_initcall (init level 2). Netlink's initialization is done in core_initcall, so this should fix the problem. We should be fine waiting until postcore_initcall.

Also a couple white space changes mixed in, because I am anal.

<[email protected]>
[PATCH] kobject_uevent: add MAINTAINER entry

Attached patch adds a MAINTAINER entry for the kernel event layer.

<[email protected]>
Merge kroah.com:/home/greg/linux/BK/bleed-2.6 into kroah.com:/home/greg/linux/BK/driver-2.6

<[email protected]>
[PATCH] fix kernel BUG at fs/sysfs/dir.c:20!

On Thu, Nov 04, 2004 at 12:52:38PM -0800, Greg KH wrote:
> Hi,
>
> I get the following BUG in the sysfs code when I do:
> - plug in a usb-serial device.
> - open the port with 'cat /dev/ttyUSB0'
> - unplug the device.
> - stop the 'cat' process with control-C
>
> This used to work just fine before your big sysfs changes.

There is a similar problem reported by s390 people where we see parent kobject (directory) going away before child kobject (sub-directory). It seems kobject code is able to handle this, but not the sysfs. What could be happening that in sysfs_remove_dir() of parent directory, we try to remove its contents. It works well with the regular files as it is the final removal for sysfs_dirent corresponding to the files. But in case of sub-directory we are doing an extra sysfs_put(). Once while removing parent and the other one being the one from when sysfs_remove_dir() is called for the child.

The following patch worked for the s390 people, I hope same will work in this case also.

o Do not remove sysfs_dirents corresponding to the sub-directory in sysfs_remove_dir(). They will be removed in the sysfs_remove_dir() call for the specific sub-directory.

<[email protected]>

	Merge bk://kernel.bkbits.net/gregkh/linux/driver-2.6
	into ppc970.osdl.org:/home/torvalds/v2.6/linux

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yes, makes sense.

yes, i think i understood that. that's why i wanted to revert 1.2463 too.

[...]

for now i appreciate your work here but i have to postpone the the "bk revtool" stuff because i have no X _and_ bk here. (but i'm a good student and will do my homework)

i can't wait... ;)

will do, after the build

hey, thanks to you and to the folks in the Cc: field to chase a bug which only _i_ encounter until now.

/me is building now....
thanks,
Christian.
- --
BOFH excuse #111:

The salesman drove over the CPU board.
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=Qlt1
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i did so, 1.2463 went away, building as usual - but the oops resists :(

http://www.nerdbynature.de/bits/prinz/2.6.10-rc1/dmesg-debug_oops-a1.2462.txt

...in progress...

hm, i guess this has to wait now.

yes, i'll look for changes regarding PCI. i've started to compile the -bk snapshots too. there i can do less wrong things. when i have the "bad" -bk snapshot i'll use "bk" itself again to find the detailed change leading to the oops.

i hope to get another machine with a another es1371 tomorrow and see if the error is reproduceable.

thanks,
Christian.

PS: i've taken linux-sound and alsa-devel from CC.
- --
BOFH excuse #74:

You're out of memory
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Actually, looking a bit closer, I think the PCI merge we just looked at was the PCI merge that happened _after_ 2.6.10-rc1. And since 2.6.10-rc1 already oopsed for you, it shouldn't be an issue.

I think the _real_ PCI merge we should have looked at is:

	[email protected], 2004-10-19 16:59:19-07:00, [email protected]
	  Merge PCI updates

and in particular, that merged the PCI changes from

[email protected], 2004-10-19 14:48:04-07:00, [email protected]
PCI: fix up pci_save/restore_state in via-agp due to api change.

with my pre-PCI-merge tree at:

	[email protected], 2004-10-19 15:06:19-07:00, [email protected]
	  Merge bk://bart.bkbits.net/ide-2.6
	  into ppc970.osdl.org:/home/torvalds/v2.6/linux

(all of these revision numbers are relative to a pristine 2.6.10-rc1
tree: remember that they change with merges, so they may not be the same in your tree. "bk changes -a" is your friend).

So what I'd like you to do is to take the pre-PCI-merge tree, and see if that works for you

	# assuming a 2.6.10-rc1 tree
	bk undo -a1.2000.1.6

and if that works, then try the post-PCI-merge tree:

	# assuming a 2.6.10-rc1 tree
	bk undo -a1.2000.1.7

(I just checked: the above numbers are actually valid even in the current -bk tree, so you don't have to first go to 2.6.10-rc1, you can just start from a current tree)

Thanks for testing, and sorry for the confusion with the more recent PCI merge.

Linus

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thanks, Linus. i'll do all this tomorrow, see my other mail i just sent. i'll definitely do all this 'cause i'm really curious about this thing. (it's not even the need of sound any more. heck, i could just put in another soundcard but that'd be too easy :)

doh, you can't image how thankful i am for your (and the other people's!) help here. but don't waste too many cycles on this weird issue here. if it does not break for a million users out there now - why bother at all? perhaps it'll break later on but then we have the lkml-archives and someone will eventually remember this thing. but no, i don't want to discourage anyone here ;-)

regards,
Christian.
- --
BOFH excuse #19:

floating point processor overflow
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=T1C6
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ok, i've done some other things here and built kernels from 2.6.10-rc1-bk13 and all were giving the oops:

http://www.nerdbynature.de/bits/prinz/2.6.10-rc1/config-2.6.10-rc1-bk13
http://www.nerdbynature.de/bits/prinz/2.6.10-rc1/dmesg-debug_oops-2.6.10-rc1-bk13.txt

the config is the same config i am usually using, never gave me a headache, new options (due to new kernel version) were left to default in most cases. anyway - i've pulled again a recent tree, did
"bk undo -a1.2463" again but this time i stripped down my .config (via menuconfig) to the absolute necessary things:

http://www.nerdbynature.de/bits/prinz/2.6.10-rc1/config-2.6.10-rc1_a1.2463_take2

...and it did *NOT* oops:

http://www.nerdbynature.de/bits/prinz/2.6.10-rc1/dmesg-no-oops-2.6.10-rc1_a1.2463.txt

i'll investigate further, building former -bk snapshots, using other configs before i'll fiddle around with bk again (to get the smaller changes). but this is a tomorrow thing, real life calls in :(

Thank you all so far,
Christian.
- --
BOFH excuse #92:

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=d8GA
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Hi,

CONFIG_PREEMPT is one obvious candidate (you have that enabled in the original config and disabled in the non-oopsing one).

Pekka

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this damn thread is far too long already...

i've disabled *only* CONFIG_PREEMPT in another .config but it still oopses:

http://www.nerdbynature.de/bits/prinz/2.6.10-rc1/dmesg-debug_oops-2.6.10-rc1_no-preempt.txt
http://www.nerdbynature.de/bits/prinz/2.6.10-rc1/config-2.6.10-rc1_no-preempt.txt

2.6.9 with preempt enabled does not oops:
http://www.nerdbynature.de/bits/prinz/2.6.10-rc1/config-2.6.9_preempt.txt
http://www.nerdbynature.de/bits/prinz/2.6.10-rc1/dmesg-no-oops_2.6.9_preempt.txt

i was a fool to test further -bk snapshots but it was kinda late yesterday
and i was confused:

patch-2.6.9.bz2 -> 19-Oct-2004
patch-2.6.10-rc1.bz2 -> 23-Oct-2004 00:12
patch-2.6.10-rc1-bk1.bz2 -> 23-Oct-2004 13:34

2.6.9 is not oopsing *here*, plain 2.6.10-rc1 is oopsing. so i can *not* use -bk snapshots any more and i will go on with BK (undo the ChangeSets Linus told me about) and use different .configs now. sorry for the confusion and especially sorry to my bk mentor: we seem to be so close to the right ChangeSet and then i started to use *snapshots* again.

Thanks,
Christian
- --
BOFH excuse #76:

Unoptimized hard drive
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=ailz
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On Tue, 09 Nov 2004 13:33:20 +0100, Christian Kujau wrote

at least i finally found the "bad" .config option: it's CONFIG_EDD. when i disable this option (and only this options. i can use the same .config as usual only disbaling this very option. diff is my witness.) i can boot a current (!) 2.6.10-rc1-bk and a working snd-ens1371!

i'll test with CONFIG_EDD=m later on. here a short summary:

2.6.9         CONFIG_EDD=y   - OK
2.6.10-rc1-bk CONFIG_EDD=y   - OOPS!
2.6.10-rc1-bk CONFIG_EDD=n   - OK
2.6.10-rc1-bk CONFIG_EDD=m   - ??

yes, i'll continue to find out the ChangeSet but now i (and perhaps you too, if you are as curious as me) will know where to look at. i must admit that i was not entirely sure why i wanted to enable CONFIG_EDD at all. if i had never enabled it, it'd have saved me a week of bug chasing, but learning is fun, too.

thanks,
Christian.

BOFH excuse #209:

Only people with names beginning with 'A' are getting mail this week (a
la Microsoft)

Very strange. There's not a lot of stuff that affects EDD directly that I can see, but there is:

[email protected], 2004-10-20 08:36:22-07:00, [email protected]
[PATCH] EDD: use EXTENDED READ command, add CONFIG_EDD_SKIP_MBR

Some controller BIOSes have problems with the legacy int13 fn02 READ SECTORS command. int13 fn42 EXTENDED READ is used in preference by most boot loaders today, so lets use that. If EXTENDED READ fails or isn't supported, fall back to READ SECTORS.

This hopefully resolves the three reports of BIOSes which would either long-pause (30+ seconds) or hang completely on the legacy READ SECTORS command.

This also adds CONFIG_EDD_SKIP_MBR to eliminate reading the MBR on each BIOS-presented disk, in case there are further problems in this area.

which might fit the bill.

However, even that would just change the EDD _data_, it doesn't change the code that actually runs in the kernel. And I _really_ don't see what EDD has got to do with anything.

I wonder if the EDD stuff corrupts the sysfs tree or something, and you're just seeing some strange kobject interference. Greg, you'd likely still be on the line for that one.

Christian, finding which change triggers this would be very good indeed. I think the merge with greg is still a good place to start, although even just doing the snapshot trees (from _before_ -rc1: ie the patches in /pub/linux/kernel/v2.6/snapshots/old: patch-2.6.9-bk*.gz) is actually also a good way to narrow things down.

Linus

This fixes a problem introduced in the previous set of driver model changes that has been seen by a lot of people (most notibly the greater than 256 pty users, but others might also be hitting this without realizing it.)

Also add a comment so we don't try to "fix" this again.

@@ -181,10 +181,10 @@ int kobject_add(struct kobject * kobj)
 
 	error = create_dir(kobj);
 	if (error) {
+		/* unlink does the kobject_put() for us */
 		unlink(kobj);
 		if (parent)
 			kobject_put(parent);
-		kobject_put(kobj);
 	} else {
 		kobject_hotplug(kobj, KOBJ_ADD);
 	}

Christian, I don't know if this patch explicitly fixes your problem, but it fixes problems other people have been having with the driver core lately. I'd appreciate it if you could test it out and let me know if it solves your problem, with CONFIG_EDD enabled, or if it doesn't help at all.

thanks,

greg k-h

Hi Greg,

The broken kobject_add fix is not in -rc1 proper which oopses on Christian's machine. I don't think this patch has anything to do with his problem.

Pekka

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yes, i'll do so and test the patch. is this in current -BK yet? because applying your patch [1] to 2.6.10-rc1 gives:

Hunk #1 FAILED at 181.
1 out of 1 hunk FAILED -- saving rejects to file lib/kobject.c.rej

i've done a few other things before, let me just post the results before i go on with your suggestions:

i've compiled a recent (BK) 2.6.10-rc1 again with CONFIG_EDD=m|y|n

http://www.nerdbynature.de/bits/prinz/2.6.10-rc1/config-2.6.10-rc1_edd-modular.txt
http://www.nerdbynature.de/bits/prinz/2.6.10-rc1/config-2.6.10-rc1_edd.txt
http://www.nerdbynature.de/bits/prinz/2.6.10-rc1/config-2.6.10-rc1_no-edd.txt

the results:

http://www.nerdbynature.de/bits/prinz/2.6.10-rc1/dmesg-2.6.10-rc1_edd-modular.txt
http://www.nerdbynature.de/bits/prinz/2.6.10-rc1/dmesg-2.6.10-rc1_edd.txt
http://www.nerdbynature.de/bits/prinz/2.6.10-rc1/dmesg-2.6.10-rc1_no-edd.txt

the interesting thing (for me) was, that when CONFIG_EDD=m was set, my sound card was working properly and i could do "modprobe edd" and "rmmod edd" as i like:

http://www.nerdbynature.de/bits/prinz/2.6.10-rc1/typescript-2.6.10-rc1_edd-modular.txt

again: i double checked and compiled on 2 different hosts, each having it's own -BK tree.

thanks,
Christian.

[1] http://www.nerdbynature.de/bits/prinz/2.6.10-rc1/edd-fix.patch
- --
BOFH excuse #22:

monitor resolution too high
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=B/3X
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please ignore my first mail (the part about not being able to patch), it's already in BK i can see now, sorry.

compiling now...

- --
BOFH excuse #22:

monitor resolution too high
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=Q+hA
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Ahh.. Christian, pls test this one.

Linus

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i'm sorry to say that it did not help:

http://www.nerdbynature.de/bits/prinz/2.6.10-rc1/dmesg-2.6.10-rc1_edd__kobject_put.txt

i'll go on and try to exclude

[email protected], 2004-10-20 08:36:22-07:00, [email protected]
[PATCH] EDD: use EXTENDED READ command, add CONFIG_EDD_SKIP_MBR

(or just test /pub/linux/kernel/v2.6/snapshots/old/patch-2.6.9-bk*.gz ...)

thanks,
Christian.
- --
BOFH excuse #200:

The monitor needs another box of pixels.
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=Qvnz
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and i say: good catch! that does it!

i did "bk undo -a1.2000.5.108" on a current tree, booting this still gives an oops:

http://www.nerdbynature.de/bits/prinz/2.6.10-rc1/dmesg-2.6.9_a1.2000.5.108.txt

excluding this single ChangeSet with "bk undo -r1.2118" does work with CONFIG_EDD=y:

http://www.nerdbynature.de/bits/prinz/2.6.10-rc1/dmesg-2.6.9_r1.2000.5.108.txt

(the filename here should really read "...r1.2118.txt" because that was the number of the changeset representing the above [PATCH] *after* i did "bk undo -a1.2000.5.108". right?)

understanding a lot less of all this than you guys i also wonder why only this single driver broke. i've always loaded a couple of drivers here, maybe i could play around a bit e.g. CONFIG_SND_ENS1371=y instead of =m or see if other hw drivers break too.

do userspace tools matter here? there is "sysfsutils-1.1.0-1" and "libsysfs1-1.1.0-1" (both debian/unstable) installed here, /sys is mounted:

sysfs on /sys type sysfs (rw)

i'll look again over the -bk magic you told me about and see what it gives.

thanks so far to all involved here, i really enjoyed "working" with you. first class support at no charge...it's just incredible.

you guys rock,
Christian.
- --
BOFH excuse #112:

The monitor is plugged into the serial port
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OK, thanks, that helps. From the diff of those dmesg:

-BIOS EDD facility v0.16 2004-Jun-25, 16 devices found +BIOS EDD facility v0.16 2004-Jun-25, 6 devices found

So with the latest EDD patch noted above, it's finding more disks than before. How many disks do you actually have in the system?

I'll review the assembly again to see where I could have miscounted, and see how that may affect the EDD sysfs exports. Likely no answer from me before tomorrow though.

Thanks,
Matt

Matt Domsch
Sr. Software Engineer, Lead Engineer
Dell Linux Solutions linux.dell.com & www.dell.com/linux
Linux on Dell mailing lists @ http://lists.us.dell.com

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i have one scsi disk (sda) and two atapi cdrom drives:

hda: CRD-8483B, ATAPI CD/DVD-ROM drive
hdb: AOPEN CD-RW CRW3248 1.17 20020620, ATAPI CD/DVD-ROM drive
...
SCSI device sda: 35548320 512-byte hdwr sectors (18201 MB) SCSI device sda: drive cache: write back

the "scsi0 : sym-2.1.18k" is on a pci card, the atapi devices are connected onboard. if it helps:

http://www.nerdbynature.de/bits/prinz/2.6.10-rc1/lspci-v.txt
http://www.nerdbynature.de/bits/prinz/2.6.10-rc1/lspci-vv.txt

that's ok, real life kicks in here too...

thanks,
Christian.

PS: do you have *any* idea how this could be related to the snd-es1371 driver (which is producing the oops then)?
- --
BOFH excuse #449:

greenpeace free'd the mallocs
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Interestingly, "16" is also EDD_MBR_SIG_MAX, so my suspicion is that it overflowed some EDD data area. edd_num_devices() (which is what reports the above number) does

	min_t(unsigned char,
		max_t(unsigned char, edd.edd_info_nr, edd.mbr_signature_nr),
		max_t(unsigned char, EDD_MBR_SIG_MAX, EDDMAXNR));

where EDDMAXNR is 6, and EDD_MBR_SIG_MAX is the afore-mentioned 16, so we know that either edd.edd_info_nr or edd.mbr_signature_nr is actually _bigger_ than 16.

Which is clearly totally bogus. In fact, even your old "6 devices found" thing looks suspiciously bogus.

I bet it's overwriting some array, and just corrupting memory after it. For example, the edd_info[] array only has 6 entries, and for example, the EDD_MBR_SIG_BUFFER is quite close to where we save the E820MAP memory map at bootup, so if something stomps on that, the kernel might be confused about where PCI memory can be allocated or similar. Or it might have overwritten some ACPI memory data, who knows.

Linus

I haven't been able to find a solution to your problem yet, and given some external time constraints I've got, won't be able to look into this again for another week or more.

Thanks,
Matt

Matt Domsch
Sr. Software Engineer, Lead Engineer
Dell Linux Solutions linux.dell.com & www.dell.com/linux
Linux on Dell mailing lists @ http://lists.us.dell.com

Matt, I'll revert the EXTENDED READ change for now, then. The random behaviour of the problem it causes makes me really dislike this bug, and I'd like to release a -rc2 and start calming down the 2.6.10 stuff, but having known random stuff happen really disturbs me.

We can re-do it once it's more obvious why it broke..

Linus

Good plan, thanks.

Matt Domsch
Sr. Software Engineer, Lead Engineer
Dell Linux Solutions linux.dell.com & www.dell.com/linux
Linux on Dell mailing lists @ http://lists.us.dell.com

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actually, my BIOS is even to old for e.g. ACPI, with latest firmware installed. i had no issues so far with the board/bios, but perhaps this is no longer true. however, it's still strange that this thing is only triggerd with you change and CONFIG_EDD=y.

nevermind then. as nobody else seem to be bothered by this i am happy with the workarund (CONFIG_EDD=n) and since the lkml-archives exist we could get back to it when it's bothering more people (n>1)

thank you for your time,
Christian.
- --
BOFH excuse #396:

Mail server hit by UniSpammer.
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=f2hG
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The problem with that approach is that very few people are willing to spend the time and effort to really try to figure out where the problem triggers for them. Thanks again for testing lots of kernels, and different configurations.

Basically, if it's a problem that only happens for a smallish percentage of people, and an even smaller percentage of those is willing to dig down and find it, it's not a problem we can afford to ignore. Ignoring it just means that there will be "a few" error reports that we will either waste time on, or (even worse) we'll dismiss as "known problems" and then possibly miss _another_ bug.

This is why I take random unexplained (but pinpointed) problems so seriously. If it wasn't as apparently random, we could file it under "known problem" and decide to try to fix it later. As it is, it's filed under "known cause", but since we don't know _why_, it might cause totally different problems on another machine, and that just makes it too painful for words.

So the changeset is reverted for now in the current -bk tree, and I'll make a -rc2 this weekend and hope that we can stabilize for 2.6.10.

Linus

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just after sending my last mail i too (re)thought about this and i'd have begged Matt to revert the patch if it was not *only* me having this issue.

but i can see your point here and i appreciate your decision.

yay!

thanks,
Christian.
- --
BOFH excuse #96:

Vendor no longer supports the product
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=wwF6
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hm, i still fail to see the "magic" part here. from a current tree i get:

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

$ bk set -n -d -r1.2000.5.107 -r1.2000.5.108 | bk -R prs -h \
- -d'<:P:@:HOST:>\n$each(:C:){\t(:C:)\n}\n' - | head -n5
<[email protected]>
  [PATCH] EDD: use EXTENDED READ command, add CONFIG_EDD_SKIP_MBR

Some controller BIOSes have problems with the legacy int13 fn02 READ SECTORS command. int13 fn42 EXTENDED READ is used in preference by most
- ---------------

which looks similiar to the next one, but with "bk changes" i get the ChangeSet number again:

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

$ bk changes -r1.2000.5.108 | head -n5
[email protected], 2004-10-20 08:36:22-07:00, [email protected]
  [PATCH] EDD: use EXTENDED READ command, add CONFIG_EDD_SKIP_MBR

Some controller BIOSes have problems with the legacy int13 fn02 READ SECTORS command. int13 fn42 EXTENDED READ is used in preference by most
- ---------------

...or was i supposed to alter your cmdline? i just copy'n'pasted it... anyway, i've seen that i have a lot of "bk help" ahead of me, thanks for the course, though ;)

greetings,
Christian.
- --
BOFH excuse #297:

Too many interrupts
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You don't see any magic, unless there are merges involved. And you've already narrowed the thing down to a single non-merge changeset, at which point the "magic" way is just a very slow way of doing the same thing.

The magic hits you only when you have non-trivial merges, in which case the set operation shows you more than the "just walk from one top-of-tree to the other".

Linus

Hi Christian,

Just to update, I cannot reproduce the oops with your config (nor mine) on my machine running 2.6.10-rc1-bk14.

Pekka

0000:00:00.0 Host bridge: VIA Technologies, Inc. VT8363/8365 [KT133/KM133] (rev 03)
Subsystem: ASUSTeK Computer Inc. A7V133/A7V133-C Mainboard
Flags: bus master, medium devsel, latency 8 Memory at e7000000 (32-bit, prefetchable)
Capabilities: [a0] AGP version 2.0
Capabilities: [c0] Power Management version 2

0000:00:01.0 PCI bridge: VIA Technologies, Inc. VT8363/8365 [KT133/KM133 AGP] (prog-if 00 [Normal decode])

        Flags: bus master, 66Mhz, medium devsel, latency 0
        Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
        I/O behind bridge: 0000d000-0000dfff
        Memory behind bridge: d7000000-d7efffff
        Prefetchable memory behind bridge: d7f00000-e6ffffff
        Expansion ROM at 0000d000 [disabled] [size=4K]
        Capabilities: [80] Power Management version 2

0000:00:04.0 ISA bridge: VIA Technologies, Inc. VT82C686 [Apollo Super South] (rev 40)
Subsystem: ASUSTeK Computer Inc. A7V133/A7V133-C Mainboard
Flags: bus master, stepping, medium devsel, latency 0
Capabilities: [c0] Power Management version 2

0000:00:04.1 IDE interface: VIA Technologies, Inc. VT82C586A/B/VT82C686/A/B/VT823x/A/C PIPC Bus Master IDE (rev 06) (prog-if
8a [Master SecP PriP])
Flags: bus master, medium devsel, latency 32 I/O ports at b800 [size=16]
Capabilities: [c0] Power Management version 2

0000:00:04.2 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 16) (prog-if 00 [UHCI])
Subsystem: VIA Technologies, Inc. (Wrong ID) USB Controller
Flags: bus master, medium devsel, latency 32, IRQ 10 I/O ports at b400 [size=32]
Capabilities: [80] Power Management version 2

0000:00:04.3 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 16) (prog-if 00 [UHCI])
Subsystem: VIA Technologies, Inc. (Wrong ID) USB Controller
Flags: bus master, medium devsel, latency 32, IRQ 10 I/O ports at b000 [size=32]
Capabilities: [80] Power Management version 2

0000:00:04.4 Bridge: VIA Technologies, Inc. VT82C686 [Apollo Super ACPI] (rev 40)
Subsystem: ASUSTeK Computer Inc. A7V133/A7V133-C Mainboard
Flags: medium devsel, IRQ 9
Capabilities: [68] Power Management version 2

0000:00:09.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10)
Subsystem: Realtek Semiconductor Co., Ltd. RT8139
Flags: bus master, medium devsel, latency 32, IRQ 10 I/O ports at 9400
Memory at d6800000 (32-bit, non-prefetchable) [size=256]
Capabilities: [50] Power Management version 2

0000:00:0a.0 Multimedia audio controller: Ensoniq 5880 AudioPCI (rev 04)
Subsystem: Ensoniq Sound Blaster 16PCI 4.1ch
Flags: bus master, slow devsel, latency 32, IRQ 11 I/O ports at 9000
Capabilities: [dc] Power Management version 2

0000:00:0d.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10)
Subsystem: Realtek Semiconductor Co., Ltd. RT8139
Flags: bus master, medium devsel, latency 32, IRQ 10 I/O ports at 8800
Memory at d6000000 (32-bit, non-prefetchable) [size=256]
Capabilities: [50] Power Management version 2

0000:01:00.0 VGA compatible controller: ATI Technologies Inc Radeon RV100 QY [Radeon 7000/VE] (prog-if 00 [VGA])
Subsystem: Hightech Information System Ltd.: Unknown device 0f02
Flags: bus master, stepping, 66Mhz, medium devsel, latency 64 Memory at d8000000 (32-bit, prefetchable) [size=d7fe0000] I/O ports at d800 [size=256]
Memory at d7000000 (32-bit, non-prefetchable) [size=64K] Expansion ROM at 00020000 [disabled]
Capabilities: [58] AGP version 2.0
Capabilities: [50] Power Management version 2

Linux version 2.6.10-rc1-bk14 (root@cherry) (gcc version 3.4.2 (Gentoo Linux 3.4.2-r2, ssp-3.4.1-1, pie-8.7.6.5)) #8 Mon Nov 8 20:18:45 EET 2004
BIOS-provided physical RAM map:
BIOS-e820: 0000000000000000 - 000000000009fc00 (usable)
BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved)
BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved)
BIOS-e820: 0000000000100000 - 000000003ffec000 (usable)
BIOS-e820: 000000003ffec000 - 000000003ffef000 (ACPI data)
BIOS-e820: 000000003ffef000 - 000000003ffff000 (reserved)
BIOS-e820: 000000003ffff000 - 0000000040000000 (ACPI NVS)
BIOS-e820: 00000000ffff0000 - 0000000100000000 (reserved)
127MB HIGHMEM available.
896MB LOWMEM available.
On node 0 totalpages: 262124
DMA zone: 4096 pages, LIFO batch:1
Normal zone: 225280 pages, LIFO batch:16
HighMem zone: 32748 pages, LIFO batch:7
DMI 2.3 present.
ACPI: RSDP (v000 ASUS ) @ 0x000f6a80
ACPI: RSDT (v001 ASUS A7V133-C 0x30303031 MSFT 0x31313031) @ 0x3ffec000
ACPI: FADT (v001 ASUS A7V133-C 0x30303031 MSFT 0x31313031) @ 0x3ffec080
ACPI: BOOT (v001 ASUS A7V133-C 0x30303031 MSFT 0x31313031) @ 0x3ffec040
ACPI: DSDT (v001 ASUS A7V133-C 0x00001000 MSFT 0x0100000b) @ 0x00000000
ACPI: PM-Timer IO Port: 0xe408
Built 1 zonelists
Kernel command line: root=/dev/ram0 init=/linuxrc real_root=/dev/hda3 acpi=force No local APIC present or hardware disabled
Initializing CPU#0
PID hash table entries: 4096 (order: 12, 65536 bytes)
Detected 1009.328 MHz processor.
Using pmtmr for high-res timesource
Console: colour VGA+ 80x25
Dentry cache hash table entries: 131072 (order: 7, 524288 bytes) Inode-cache hash table entries: 65536 (order: 6, 262144 bytes)
Memory: 1034128k/1048496k available (2582k kernel code, 13664k reserved, 770k data, 148k init, 130992k highmem)
Checking if this processor honours the WP bit even in supervisor mode... Ok. Calibrating delay loop... 1998.84 BogoMIPS (lpj=999424)
Mount-cache hash table entries: 512 (order: 0, 4096 bytes)
CPU: After generic identify, caps: 0383f9ff c1c7f9ff 00000000 00000000
CPU: After vendor identify, caps: 0383f9ff c1c7f9ff 00000000 00000000
CPU: L1 I Cache: 64K (64 bytes/line), D cache 64K (64 bytes/line)
CPU: L2 Cache: 64K (64 bytes/line)
CPU: After all inits, caps: 0383f9ff c1c7f9ff 00000000 00000020
CPU: AMD Duron(tm) Processor stepping 00
Enabling fast FPU save and restore... done.
Enabling unmasked SIMD FPU exception support... done.
Checking 'hlt' instruction... OK.
ACPI: IRQ9 SCI: Edge set to Level Trigger.
checking if image is initramfs...it isn't (no cpio magic); looks like an initrd Freeing initrd memory: 885k freed
kobject_uevent: unable to create netlink socket!
NET: Registered protocol family 16
PCI: PCI BIOS revision 2.10 entry at 0xf1180, last bus=1
PCI: Using configuration type 1
mtrr: v2.0 (20020519)
ACPI: Subsystem revision 20040816
ACPI: Interpreter enabled
ACPI: Using PIC for interrupt routing
ACPI: PCI Interrupt Link [LNKA] (IRQs 3 4 5 6 7 9 10 11 12 14 15) *0, disabled.
ACPI: PCI Interrupt Link [LNKB] (IRQs 3 4 5 6 7 9 10 11 12 14 15) *0, disabled.
ACPI: PCI Interrupt Link [LNKC] (IRQs 3 4 5 6 7 9 10 11 12 14 15) *0, disabled.
ACPI: PCI Interrupt Link [LNKD] (IRQs 3 4 5 6 7 9 *10 11 12 14 15)
ACPI: PCI Root Bridge [PCI0] (00:00)
PCI: Probing PCI hardware (bus 00)
ACPI: PCI Interrupt Routing Table [\_SB_.PCI0._PRT]
PCI: Using ACPI for IRQ routing
ACPI: PCI Interrupt Link [LNKD] enabled at IRQ 10
ACPI: PCI interrupt 0000:00:04.2[D] -> GSI 10 (level, low) -> IRQ 10
ACPI: PCI interrupt 0000:00:04.3[D] -> GSI 10 (level, low) -> IRQ 10
ACPI: PCI interrupt 0000:00:09.0[A] -> GSI 10 (level, low) -> IRQ 10
ACPI: PCI Interrupt Link [LNKC] enabled at IRQ 11
ACPI: PCI interrupt 0000:00:0a.0[A] -> GSI 11 (level, low) -> IRQ 11
ACPI: PCI interrupt 0000:00:0d.0[A] -> GSI 10 (level, low) -> IRQ 10 Simple Boot Flag at 0x3a set to 0x1
highmem bounce pool size: 64 pages
devfs: 2004-01-31 Richard Gooch ([email protected])
devfs: boot_options: 0x0
SGI XFS with ACLs, realtime, no debug enabled
SGI XFS Quota Management subsystem
Applying VIA southbridge workaround.
PCI: Disabling Via external APIC routing
Real Time Clock Driver v1.12
serio: i8042 AUX port at 0x60,0x64 irq 12
serio: i8042 KBD port at 0x60,0x64 irq 1
io scheduler noop registered
io scheduler anticipatory registered
io scheduler deadline registered
io scheduler cfq registered
RAMDISK driver initialized: 16 RAM disks of 8192K size 1024 blocksize
Equalizer2002: Simon Janes ([email protected]) and David S. Miller ([email protected])
Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
VP_IDE: IDE controller at PCI slot 0000:00:04.1
VP_IDE: chipset revision 6
VP_IDE: not 100% native mode: will probe irqs later
VP_IDE: VIA vt82c686b (rev 40) IDE UDMA100 controller on pci0000:00:04.1

    ide0: BM-DMA at 0xb800-0xb807, BIOS settings: hda:DMA, hdb:pio
    ide1: BM-DMA at 0xb808-0xb80f, BIOS settings: hdc:DMA, hdd:pio

Probing IDE interface ide0...
hda: Maxtor 4D060H3, ATA DISK drive
elevator: using anticipatory as default io scheduler
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
Probing IDE interface ide1...
hdc: Hewlett-Packard CD-Writer Plus 8200a, ATAPI CD/DVD-ROM drive ide1 at 0x170-0x177,0x376 on irq 15
Probing IDE interface ide2...
ide2: Wait for ready failed before probe !
Probing IDE interface ide3...
ide3: Wait for ready failed before probe !
Probing IDE interface ide4...
ide4: Wait for ready failed before probe !
Probing IDE interface ide5...
ide5: Wait for ready failed before probe !
hda: max request size: 128KiB
hda: 120069936 sectors (61475 MB) w/2048KiB Cache, CHS=65535/16/63, UDMA(100)
hda: cache flushes not supported
/dev/ide/host0/bus0/target0/lun0: p1 p2 p3
hdc: ATAPI 32X CD-ROM CD-R/RW drive, 4096kB Cache, UDMA(33) Uniform CD-ROM driver Revision: 3.20
ide-floppy driver 0.99.newide
mice: PS/2 mouse device common for all mice
input: AT Translated Set 2 keyboard on isa0060/serio0
input: ImPS/2 Logitech Wheel Mouse on isa0060/serio1
NET: Registered protocol family 2
IP: routing cache hash table of 8192 buckets, 64Kbytes
TCP: Hash tables configured (established 262144 bind 65536)
NET: Registered protocol family 1
NET: Registered protocol family 10
IPv6 over IPv4 tunneling driver
NET: Registered protocol family 17
ACPI: (supports S0 S1 S4 S5)
ACPI wakeup devices:
PWRB PCI0 UAR1 UAR2 USB0 USB1
RAMDISK: Compressed image found at block 0
VFS: Mounted root (ext2 filesystem) readonly.
Freeing unused kernel memory: 148k freed
usbcore: registered new driver usbfs
usbcore: registered new driver hub
usbcore: registered new driver usbhid drivers/usb/input/hid-core.c: v2.0:USB HID core driver
SCSI subsystem initialized
Initializing USB Mass Storage driver...
usbcore: registered new driver usb-storage
USB Mass Storage support registered.
ohci_hcd: 2004 Feb 02 USB 1.1 'Open' Host Controller (OHCI) Driver (PCI)
ReiserFS: hda3: warning: sh-2021: reiserfs_fill_super: can not find reiserfs on hda3
kjournald starting. Commit interval 5 seconds
EXT3 FS on hda3, internal journal
EXT3-fs: mounted filesystem with ordered data mode.
Adding 2040244k swap on /dev/hda2. Priority:-1 extents:1
EXT3 FS on hda3, internal journal
8139too Fast Ethernet driver 0.9.27

PCI: Enabling device 0000:00:09.0 (0004 -> 0007)
ACPI: PCI interrupt 0000:00:09.0[A] -> GSI 10 (level, low) -> IRQ 10
eth0: RealTek RTL8139 at 0xf8814000, 00:06:4f:01:66:57, IRQ 10
eth0:  Identified 8139 chip type 'RTL-8139C'
PCI: Enabling device 0000:00:0d.0 (0004 -> 0007)
ACPI: PCI interrupt 0000:00:0d.0[A] -> GSI 10 (level, low) -> IRQ 10
eth1: RealTek RTL8139 at 0xf8816000, 00:06:4f:01:66:58, IRQ 10
eth1:  Identified 8139 chip type 'RTL-8139C'
eth0: link up, 100Mbps, full-duplex, lpa 0x45E1

[drm] Initialized radeon 1.11.0 20020828 on minor 0: ATI Technologies Inc Radeon RV100 QY [Radeon 7000/VE]
[drm:radeon_cp_init] *ERROR* radeon_cp_init called without lock held [drm:radeon_unlock] *ERROR* Process 6283 using kernel context 0 inserting floppy driver for 2.6.10-rc1-bk14
Floppy drive(s): fd0 is 1.44M
FDC 0 is a post-1991 82077
PCI: Enabling device 0000:00:0a.0 (0004 -> 0005)
ACPI: PCI interrupt 0000:00:0a.0[A] -> GSI 11 (level, low) -> IRQ 11

But 2.6.10-rc1-bk15 does have the problem?

Trying to figure out where the issue is...

greg k-h

Hi,

No, -bk14 is just the kernel I am running right now (I haven't tried -bk15) and I haven't had the problem. I cannot reproduce the oops _at all_ which is why I suspect it's his hardware. I included my lspci and dmesg output because we have similar (but not exactly the same) setups.

FWIW, I've asked Christian for an obdump of the kernel to see if I can track down where it oopses at because I cannot find anything in the code. I suspected pcibios_enable_irq (which is a function pointer) might be wrong but looking at his logs, I don't think we get that far.

Pekka

Sorry for not being clear, any kernel after 2.6.10-rc1 oopses according to Christian which is why I haven't bothered to test anything else except -bk14.

Pekka

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i could use the -bk snapshots too, but since i am using bk myself (i try), i think we can narrow it down a bit more.

i've put an lspci output here:
http://www.nerdbynature.de/bits/prinz/2.6.10-rc1/lspci-v.txt
http://www.nerdbynature.de/bits/prinz/2.6.10-rc1/lspci-vv.txt

i do not suspect hw problems *yet*, because kernel up to 2.6.9 (tracking bk) do not show this behaviour.

will show up in a couple of minutes here:
http://www.nerdbynature.de/bits/prinz/2.6.10-rc1/objdump-d_a1.2463.txt.bz2

this is from the vmlinux from a "bk undo -a1.2463" kernel, IOW it still contains:

[email protected], 2004-11-04 17:07:16-08:00, [email protected]
Merge bk://kernel.bkbits.net/gregkh/linux/driver-2.6 into ppc970.osdl.org:/home/torvalds/v2.6/linux

thank you for the hints,
Christian.

PS: should we i un'CC linux-sound and alsa-devel, now we are sure it's a pci thing?
- --
BOFH excuse #228:

That function is not currently supported, but Bill Gates assures us it will be featured in the next upgrade.
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Hi Christian,

I am running 2.6.10-rc1-bk14 with ens-1371 working ok. Could you please post your .config so I can try to reproduce your oops?

Pekka

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i put it on
http://www.nerdbynature.de/bits/prinz/2.6.10-rc1/config

thank you,
Christian.
- --
BOFH excuse #361:

Communist revolutionaries taking over the server room and demanding all the computers in the building or they shoot the sysadmin. Poor misguided fools.
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