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Re: kernel crash 2.6.31.14-0.1-xen from openSUSE 11.2

To: Dave Chinner <david@xxxxxxxxxxxxx>
Subject: Re: kernel crash 2.6.31.14-0.1-xen from openSUSE 11.2
From: Eric Sandeen <sandeen@xxxxxxxxxxx>
Date: Wed, 13 Oct 2010 17:07:56 -0500
Cc: Michael Monnerie <michael.monnerie@xxxxxxxxxxxxxxxxxxx>, xfs@xxxxxxxxxxx
In-reply-to: <20101010015628.GL4681@dastard>
References: <201010092355.17240@xxxxxx> <20101010015628.GL4681@dastard>
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.9) Gecko/20100907 Fedora/3.1.3-1.fc13 Lightning/1.0b3pre Thunderbird/3.1.3
On 10/09/2010 08:56 PM, Dave Chinner wrote:
> On Sat, Oct 09, 2010 at 11:55:16PM +0200, Michael Monnerie wrote:
>> I just had a bug in one VM, and don't know if this is XFS related, but it 
>> seems so.
>>
>> [1172140.926859] BUG: unable to handle kernel paging request at 
>> 00000003d03dd178
>> [1172140.926877] IP: [<ffffffff80034872>] dequeue_task+0x72/0x110
>> [1172140.926897] PGD 1b54b067 PUD 0 
>> [1172140.926897] Thread overran stack, or stack corrupted
>                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Awesome, that's the 2nd time in like 4 years I've seen that stack canary
I put in actually be useful ;)

-Eric

> The stack trace shows pdflush doing writeback, and way down the
> stack doing a memory allocation that triggered direct reclaim, which
> caused writeback to occur, which blew the stack.....
> 
> Cheers,
> 
> Dave.
> 

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