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Re: Crash on 2.6.21.7 Vanilla + DRBD 0.7

To: xfs@xxxxxxxxxxx
Subject: Re: Crash on 2.6.21.7 Vanilla + DRBD 0.7
From: David Chinner <dgc@xxxxxxx>
Date: Fri, 5 Oct 2007 09:10:37 +1000
In-reply-to: <20071004133302.GA5058@apartia.fr>
References: <20071004133302.GA5058@apartia.fr>
Sender: xfs-bounce@xxxxxxxxxxx
User-agent: Mutt/1.4.2.1i
On Thu, Oct 04, 2007 at 03:33:02PM +0200, vindex+lists-xfs@xxxxxxxxxxx wrote:
> 
> Hi,
> 
> I did compile a fresh 2.6.21.7 kernel from kernel.org (no distro patch,
> ....), and latest svn (3062) 0.7.X drbd.
> 
> After just 2 days of uptime, I did experience another crash.
> 
> I wonder if it is an XFS related bug, a DRBD one, or related to XFS on
> top of DRBD.
> 
> This bug seems to occur with intensive IO operations.
> 
> What do you think about it ?
> 
> Thanks
> 
> 
> Oct  3 18:55:23  kernel: Oops: 0002 [#1]
> Oct  3 18:55:23  kernel: SMP 
> Oct  3 18:55:23  kernel: CPU:    7
> Oct  3 18:55:23  kernel: EIP:    0060:[<c016540c>]    Not tainted VLI
> Oct  3 18:55:23  kernel: EFLAGS: 00010046   (2.6.21-dl380-g5-20071001 #1)
> Oct  3 18:55:23  kernel: EIP is at cache_alloc_refill+0x11c/0x4f0

Use after free somewhere, i'd say. Turn on slab/slub poisoning and
other memory debugging options and see where it panics next
time.

Cheers,

Dave.
-- 
Dave Chinner
Principal Engineer
SGI Australian Software Group


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