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

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Message-ID: <20080415223215.GA14364@elte.hu>
Date:	Wed, 16 Apr 2008 00:32:15 +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 Wed, 16 Apr 2008, Ingo Molnar wrote:
> 
> > have you tried my config on that box? Check:
> > 
> >   http://redhat.com/~mingo/misc/config-Thu_Apr_10_10_41_16_CEST_2008.bad.rc9
> 
> Yup that config fails here too... 

great. Note that it's randconfig generated - so watch out for weird 
config combinations.

randconfig, besides finding build-bugs, is also good at finding various 
runtime bugs: it is great at finding weird alignment and 
boundary-condition bugs in generic code, and it's also great at finding 
races (by virtue of introducing random delays between various functions, 
via random enabling/disabling of debug facilities and other options that 
impact the generated code's layout and timing).

	Ingo
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