linux-kernel - Re: BUG at mm/slab.c:2990 with 2.6.33-rc5-tuxonice

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Message-ID: <4B5F5794.8020302@cs.helsinki.fi>
Date:	Tue, 26 Jan 2010 22:59:00 +0200
From:	Pekka Enberg <penberg@...helsinki.fi>
To:	Matt Mackall <mpm@...enic.com>
CC:	Nigel Cunningham <ncunningham@...a.org.au>,
	Pedro Ribeiro <pedrib@...il.com>, linux-kernel@...r.kernel.org,
	Christoph Lameter <cl@...ux-foundation.org>,
	"linux-mm@...ck.org >> linux-mm" <linux-mm@...ck.org>
Subject: Re: BUG at mm/slab.c:2990 with 2.6.33-rc5-tuxonice

Matt Mackall wrote:
> On Wed, 2010-01-27 at 07:39 +1100, Nigel Cunningham wrote:
>> Hi.
>>
>> Pedro Ribeiro wrote:
>>> Hi,
>>>
>>> I hit a bug at mm/slab.c:2990 with .33-rc5.
>>> Unfortunately nothing more is available than a screen picture with a
>>> crash dump, although it is a good one.
>>> The bug was hit almost at the end of a hibernation cycle with
>>> Tux-on-Ice, while saving memory contents to an encrypted swap
>>> partition.
>>>
>>> The image is here http://img264.imageshack.us/img264/9634/mmslab.jpg (150 kb)
>>>
>>> Hopefully it is of any use for you. Please let me know if you need any
>>> more info.
>> Looks to me to be completely unrelated to TuxOnIce - at least at a first
>> glance.
>>
>> Ccing the slab allocator maintainers listed in MAINTAINERS.
> 
> Not sure if this will do us any good, it's the second oops.

Looks like slab corruption to me which is usually not a slab bug but 
caused by buggy callers. Is CONFIG_DEBUG_SLAB enabled?
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