linux-kernel - Re: [Bug #14141] order 2 page allocation failures in iwlagn

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Date:	Tue,  6 Oct 2009 10:25:40 +0900 (JST)
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	David Rientjes <rientjes@...gle.com>
Cc:	kosaki.motohiro@...fujitsu.com, Frans Pop <elendil@...net.nl>,
	Mel Gorman <mel@....ul.ie>, "Rafael J. Wysocki" <rjw@...k.pl>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Kernel Testers List <kernel-testers@...r.kernel.org>,
	Pekka Enberg <penberg@...helsinki.fi>,
	Reinette Chatre <reinette.chatre@...el.com>,
	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>,
	Karol Lewandowski <karol.k.lewandowski@...il.com>,
	linux-mm@...ck.org
Subject: Re: [Bug #14141] order 2 page allocation failures in iwlagn

> On Mon, 5 Oct 2009, Frans Pop wrote:
> 
> > And the winner is:
> > 2ff05b2b4eac2e63d345fc731ea151a060247f53 is first bad commit
> > commit 2ff05b2b4eac2e63d345fc731ea151a060247f53
> > Author: David Rientjes <rientjes@...gle.com>
> > Date:   Tue Jun 16 15:32:56 2009 -0700
> > 
> >     oom: move oom_adj value from task_struct to mm_struct
> > 
> > I'm confident that the bisection is good. The test case was very reliable 
> > while zooming in on the merge from akpm.
> > 
> 
> I doubt it for two reasons: (i) this commit was reverted in 0753ba0 since 
> 2.6.31-rc7 and is no longer in the kernel, and (ii) these are GFP_ATOMIC 
> allocations which would be unaffected by oom killer scores.

I agree. this patch is pretty obvious correct. it was reverted by
one unfortunately regression.


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