linux-kernel - Re: [bug] SLUB + mm/slab.c boot crash in -rc9

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Message-ID: <20080415205857.GD31645@elte.hu>
Date:	Tue, 15 Apr 2008 22:58:57 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Christoph Lameter <clameter@....com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Pekka Enberg <penberg@...helsinki.fi>,
	linux-kernel@...r.kernel.org, Mel Gorman <mel@....ul.ie>,
	Nick Piggin <npiggin@...e.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>, Yinghai.Lu@....com,
	apw@...dowen.org,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Subject: Re: [bug] SLUB + mm/slab.c boot crash in -rc9


* Christoph Lameter <clameter@....com> wrote:

> On Tue, 15 Apr 2008, Ingo Molnar wrote:
> 
> > my current guess would have been some bootmem regression/interaction 
> > that messes up the buddy bitmaps - but i just reverted to the v2.6.24 
> > version of bootmem.c and that crashes too ...
> 
> The simplest solution for now may be to go with your workaround increasing 
> SECTION_SIZE_BITS to 27. [...]

the bug's effects are so severe that this is the last thing i'd like to 
do.

	Ingo
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