linux-kernel - Kernel 3.6-rc3 BUG at mm/slab.c:2629

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Message-ID: <503CA1A2.90104@mellanox.com>
Date:	Tue, 28 Aug 2012 13:46:58 +0300
From:	Haggai Eran <haggaie@...lanox.com>
To:	LKML <linux-kernel@...r.kernel.org>
CC:	Or Gerlitz <ogerlitz@...lanox.com>,
	Shachar Raindel <raindel@...lanox.com>
Subject: Kernel 3.6-rc3 BUG at mm/slab.c:2629

Hi,

I believe I have encountered a bug in kernel 3.6-rc3. It starts with the
assertion in mm/slab.c:2629 failing, and then the system hangs. I can
reproduce this bug by running a large compilation (compiling the kernel
for instance).

Here's what I see in netconsole:
> ------------[ cut here ]------------
> kernel BUG at mm/slab.c:2629!
> invalid opcode: 0000 [#1] SMP DEBUG_PAGEALLOC

I'm attaching netconsole logs I got with kernel 3.6-rc1, which contain a
little more details after the crash, but for some reason netconsole
didn't capture the full stack trace of the assertion. I caught a glimpse
at the console and I saw RIP was at cache_alloc_refill.

I'd be happy to provide further information or perform testing to help
solve this issue.

Regards,
Haggai Eran

View attachment "bug-3.6-rc1-mm-slab-c-2629.txt" of type "text/plain" (23552 bytes)