linux-kernel - Re: PROBLEM: kernel BUG at mm/page

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Message-Id: <201001292302.04105.mb@emeraldcity.de>
Date:	Fri, 29 Jan 2010 23:01:57 +0100
From:	Michail Bachmann <mb@...raldcity.de>
To:	Mel Gorman <mel@....ul.ie>
Cc:	Christoph Lameter <cl@...ux-foundation.org>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: PROBLEM: kernel BUG at mm/page_alloc.c:775

> > 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?
> 
> 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 hours 
it found a memory error. The funny thing is, linux found it much faster...

Thanks for your time.

CU Micha

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