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

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Message-ID: <Pine.LNX.4.64.0804151423460.3252@schroedinger.engr.sgi.com>
Date:	Tue, 15 Apr 2008 14:24:55 -0700 (PDT)
From:	Christoph Lameter <clameter@....com>
To:	Ingo Molnar <mingo@...e.hu>
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

On Tue, 15 Apr 2008, Ingo Molnar wrote:

> > 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)

No guarantee. Its up to the linker. Sorry. We could add a new percpu.last 
section but that requires a number of changes to linking.

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