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

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Message-ID: <20080415212301.GA5428@elte.hu>
Date:	Tue, 15 Apr 2008 23:23:01 +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, travis@....com,
	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:
> 
> > what's the best way to artificially increase the size of the allocated 
> > per cpu area? (say double it)
> 
> Add a big  per cpu declaration?
> 
> static DEFINE_PER_CPU(char, dummy)[10000];

what's the guarantee that it's at the end of the section? I'd like to 
pad the per cpu areas at their end. (doubling their size is a good way 
to achieve that)

	Ingo
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