netdev - Re: [PATCH 0/5] Candidate fix for increased number of GFP

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Date:	Thu, 22 Oct 2009 08:43:38 -0700
From:	reinette chatre <reinette.chatre@...el.com>
To:	Mel Gorman <mel@....ul.ie>
Cc:	Frans Pop <elendil@...net.nl>, Jiri Kosina <jkosina@...e.cz>,
	Sven Geggus <lists@...hsschwanzdomain.de>,
	Karol Lewandowski <karol.k.lewandowski@...il.com>,
	Tobias Oetiker <tobi@...iker.ch>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	David Miller <davem@...emloft.net>,
	Kalle Valo <kalle.valo@....fi>,
	David Rientjes <rientjes@...gle.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	"Abbas, Mohamed" <mohamed.abbas@...el.com>,
	Jens Axboe <jens.axboe@...cle.com>,
	"John W. Linville" <linville@...driver.com>,
	Pekka Enberg <penberg@...helsinki.fi>,
	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>,
	Greg Kroah-Hartman <gregkh@...e.de>,
	Stephan von Krawczynski <skraw@...net.com>,
	Kernel Testers List <kernel-testers@...r.kernel.org>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-mm@...ck.org\"" <linux-mm@...ck.org>
Subject: Re: [PATCH 0/5] Candidate fix for increased number of GFP_ATOMIC
 failures V2

On Thu, 2009-10-22 at 07:22 -0700, Mel Gorman wrote:
> [Bug #14141] order 2 page allocation failures in iwlagn
> 	Commit 4752c93c30441f98f7ed723001b1a5e3e5619829 introduced GFP_ATOMIC
> 	allocations within the wireless driver. This has caused large numbers
> 	of failure reports to occur as reported by Frans Pop. Fixing this
> 	requires changes to the driver if it wants to use GFP_ATOMIC which
> 	is in the hands of Mohamed Abbas and Reinette Chatre. However,
> 	it is very likely that it has being compounded by core mm changes
> 	that this series is aimed at.

Driver has been changed to allocate paged skb for its receive buffers.
This reduces amount of memory needed from order-2 to order-1. This work
is significant and will thus be in 2.6.33. 

Reinette


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