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Message-ID: <84144f020804110121l8444aafl4631071b34c458fe@mail.gmail.com>
Date: Fri, 11 Apr 2008 11:21:09 +0300
From: "Pekka Enberg" <penberg@cs.helsinki.fi>
To: "Ingo Molnar" <mingo@elte.hu>
Subject: Re: [bug] mm/slab.c boot crash in -git, "kernel BUG at mm/slab.c:2103!"
Cc: linux-kernel@vger.kernel.org, "Christoph Lameter" <clameter@sgi.com>,
       "Mel Gorman" <mel@csn.ul.ie>, "Nick Piggin" <npiggin@suse.de>,
       "Linus Torvalds" <torvalds@linux-foundation.org>,
       "Andrew Morton" <akpm@linux-foundation.org>
In-Reply-To: <20080411074145.GA4944@elte.hu>
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Hi Ingo,

On Fri, Apr 11, 2008 at 10:41 AM, Ingo Molnar <mingo@elte.hu> wrote:
>  our x86.git randconfig auto-qa found a mm/slab.c early-bootup crash in
>  mainline that got introduced since v2.6.24.
>
>   http://redhat.com/~mingo/misc/log-Thu_Apr_10_10_41_16_CEST_2008.bad
>   http://redhat.com/~mingo/misc/config-Thu_Apr_10_10_41_16_CEST_2008.bad
>
>  Note, the very same bzImage does not crash on other testboxes - only on
>  this 8-way box with 4GB of RAM.
>
>  i tried a "use v2.6.24's slab.c" revert (with a few API fixes needed for
>  it to build on .25) but that didnt solve the problem either.

As mentioned privately, I suspect it's the page allocator changes that
went into 2.6.24. Mel, Christoph, any ideas?