linux-kernel - Re: 2.6.32-rc6 BUG at mm/slab.c:2869!

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Date:	Thu, 20 Aug 2009 07:19:37 -0400
From:	Bob Copeland <me@...copeland.com>
To:	Pekka Enberg <penberg@...helsinki.fi>
Cc:	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-ext4@...r.kernel.org, Vegard Nossum <vegard.nossum@...il.com>
Subject: Re: 2.6.32-rc6 BUG at mm/slab.c:2869!

On Thu, Aug 20, 2009 at 08:08:16AM +0300, Pekka Enberg wrote:
> Someone is stomping on SLAB internal data structures. Ext4 appears in
> both stack traces so I guess we should CC linux-ext4. How easy is it
> to reproduce this bug? One option is to try kmemcheck to see if it
> catches the problem (see Documentation/kmemcheck.txt for details).

I don't yet have a way to reproduce at will but I've anecdotally hit
this or some related bug 3 times in the last week or two without trying,
I only now captured a stack trace.  I can try some workload to exercise
the filesystem a bit more to see what turns up.

I'll try that and kmemcheck next.

-- 
Bob Copeland %% www.bobcopeland.com

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