From: Michail Bachmann <mb@emeraldcity.de>
To: Mel Gorman <mel@csn.ul.ie>
Subject: Re: PROBLEM: kernel BUG at mm/page_alloc.c:775
Date: Fri, 29 Jan 2010 23:01:57 +0100
User-Agent: KMail/1.12.4 (Linux/2.6.32-trunk-686; KDE/4.3.4; i686; ; )
Cc: Christoph Lameter <cl@linux-foundation.org>, linux-mm@kvack.org,
       linux-kernel@vger.kernel.org
References: <201001092232.21841.mb@emeraldcity.de> <20100118120315.GD7499@csn.ul.ie> <201001210110.18569.mb@emeraldcity.de>
In-Reply-To: <201001210110.18569.mb@emeraldcity.de>
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> > On Tue, Jan 12, 2010 at 03:25:23PM -0600, Christoph Lameter wrote:
> > > On Sat, 9 Jan 2010, Michail Bachmann wrote:
> > > > [   48.505381] kernel BUG at mm/page_alloc.c:775!
> > >
> > > Somehow nodes got mixed up or the lookup tables for pages / zones are
> > > not giving the right node numbers.
> >
> > Agreed. On this type of machine, I'm not sure how that could happen
> > short of struct page information being corrupted. The range should
> > always be aligned to a pageblock boundary and I cannot see how that
> > would cross a zone boundary on this machine.
> >
> > Does this machine pass memtest?
>=20
> I ran one pass with memtest86 without errors before posting this bug, but=
 I
> can let it run "all tests" for a while just to be sure it is not caused by
> broken hw.

Please disregard this bug report. After running memtest for more than 10 ho=
urs=20
it found a memory error. The funny thing is, linux found it much faster...

Thanks for your time.

CU Micha

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