linux-kernel - Re: [PATCH 0/5] Reduce GFP_ATOMIC allocation failures, candidate fix V3

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Message-ID: <alpine.DEB.2.00.0911131346560.22447@wbuna.brgvxre.pu>
Date:	Fri, 13 Nov 2009 13:47:35 +0100 (CET)
From:	Tobias Oetiker <tobi@...iker.ch>
To:	Mel Gorman <mel@....ul.ie>
cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Frans Pop <elendil@...net.nl>, Jiri Kosina <jkosina@...e.cz>,
	Sven Geggus <lists@...hsschwanzdomain.de>,
	Karol Lewandowski <karol.k.lewandowski@...il.com>,
	linux-kernel@...r.kernel.org,
	"linux-mm@...ck.org\\\"" <linux-mm@...ck.org>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Pekka Enberg <penberg@...helsinki.fi>,
	Rik van Riel <riel@...hat.com>,
	Christoph Lameter <cl@...ux-foundation.org>,
	Stephan von Krawczynski <skraw@...net.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Kernel Testers List <kernel-testers@...r.kernel.org>
Subject: Re: [PATCH 0/5] Reduce GFP_ATOMIC allocation failures, candidate
 fix V3

Hi Mel,

Yesterday Mel Gorman wrote:

> Sorry for the long delay in posting another version. Testing is extremely
> time-consuming and I wasn't getting to work on this as much as I'd have liked.
>
> Changelog since V2
>   o Dropped the kswapd-quickly-notice-high-order patch. In more detailed
>     testing, it made latencies even worse as kswapd slept more on high-order
>     congestion causing order-0 direct reclaims.
>   o Added changes to how congestion_wait() works
>   o Added a number of new patches altering the behaviour of reclaim

so is there anything promissing for the order 5 allocation problems
in this set?

cheers
tobi


-- 
Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten, Switzerland
http://it.oetiker.ch tobi@...iker.ch ++41 62 775 9902 / sb: -9900
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