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From: Américo Wang on 10 Mar 2010 03:30
Hello, mm experts,

I triggered an mm bug today, the full backtrace is here:

http://pastebin.ca/1831436

I am using yesterday's Linus tree.

It's not easy to reproduce this, I got this very randomly.

Some related config's are:

CONFIG_SLAB=y
CONFIG_SLABINFO=y
# CONFIG_DEBUG_SLAB is not set

Please let me know if you need more info.

Thanks.
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From: Pekka Enberg on 10 Mar 2010 05:30
Américo Wang kirjoitti:
> Hello, mm experts,
>
> I triggered an mm bug today, the full backtrace is here:
>
> http://pastebin.ca/1831436
>
> I am using yesterday's Linus tree.
>
> It's not easy to reproduce this, I got this very randomly.
>
> Some related config's are:
>
> CONFIG_SLAB=y
> CONFIG_SLABINFO=y
> # CONFIG_DEBUG_SLAB is not set
>
> Please let me know if you need more info.

Looks like regular SLAB corruption bug to me. Can you trigget it with SLUB?

Anyway, it seems very unlikely that it's caused by the SLAB changes in
-rc1 so I'm CC'ing scheduler and fs folks in case the oops rings a bell.

Pekka
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From: Christoph Lameter on 10 Mar 2010 09:40
On Wed, 10 Mar 2010, Pekka Enberg wrote:

> > Please let me know if you need more info.
>
> Looks like regular SLAB corruption bug to me. Can you trigget it with SLUB?

Run SLUB with CONFIG_SLUB_DEBUG_ON or specify slub_debug on the kernel
command line to have all allocations checked.

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From: Américo Wang on 10 Mar 2010 21:50
On Wed, Mar 10, 2010 at 10:33 PM, Christoph Lameter
<cl(a)linux-foundation.org> wrote:
> On Wed, 10 Mar 2010, Pekka Enberg wrote:
>
>> > Please let me know if you need more info.
>>
>> Looks like regular SLAB corruption bug to me. Can you trigget it with SLUB?
>
> Run SLUB with CONFIG_SLUB_DEBUG_ON or specify slub_debug on the kernel
> command line to have all allocations checked.
>
>

Ok, I will try it today.
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From: Américo Wang on 11 Mar 2010 05:00
On Thu, Mar 11, 2010 at 10:42 AM, Américo Wang <xiyou.wangcong(a)gmail.com> wrote:
> On Wed, Mar 10, 2010 at 10:33 PM, Christoph Lameter
> <cl(a)linux-foundation.org> wrote:
>> On Wed, 10 Mar 2010, Pekka Enberg wrote:
>>
>>> > Please let me know if you need more info.
>>>
>>> Looks like regular SLAB corruption bug to me. Can you trigget it with SLUB?
>>
>> Run SLUB with CONFIG_SLUB_DEBUG_ON or specify slub_debug on the kernel
>> command line to have all allocations checked.
>>
>>
>
> Ok, I will try it today.
>

Sorry, I can't trigger it today, either with SLAB or SLUB.
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Prev: [PATCH] Staging: phison: fix space before TAB coding style issue in phison.c This is a patch to the phison.c file that fixes up a space before TAB warning found by the checkpatch.pl tool Signed-off-by: Lin Chan Hsiao <linchan.hsiao@gmail.com>
Next: get_maintainer: Repair STDIN usage