linux-kernel - Re: [PATCH 5/5] ONLY-APPLY-IF-STILL-FAILING Revert 373c0a7e, 8aa7e847: Fix congestion_wait() sync/async vs read/write confusion

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Date:	Thu, 22 Oct 2009 23:49:34 +0200
From:	Jens Axboe <jens.axboe@...cle.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>,
	Reinette Chatre <reinette.chatre@...el.com>,
	Kalle Valo <kalle.valo@....fi>,
	David Rientjes <rientjes@...gle.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Mohamed Abbas <mohamed.abbas@...el.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, linux-kernel@...r.kernel.org,
	"linux-mm@...ck.org" <linux-mm@...ck.org>
Subject: Re: [PATCH 5/5] ONLY-APPLY-IF-STILL-FAILING Revert 373c0a7e,
	8aa7e847: Fix congestion_wait() sync/async vs read/write confusion

On Thu, Oct 22 2009, Mel Gorman wrote:
> Testing by Frans Pop indicates that in the 2.6.30..2.6.31 window at
> least that the commits 373c0a7e 8aa7e847 dramatically increased the
> number of GFP_ATOMIC failures that were occuring within a wireless
> driver. It was never isolated which of the changes was the exact problem
> and it's possible it has been fixed since. If problems are still
> occuring with GFP_ATOMIC in 2.6.31-rc5, then this patch should be
> applied to determine if the congestion_wait() callers are still broken.

I still think this is a complete red herring.

-- 
Jens Axboe

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