linux-kernel - Re: [rfc patch 1/6] memcg: remove unused retry signal from reclaim

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Message-ID: <4DCBF67A.3060700@redhat.com>
Date:	Thu, 12 May 2011 11:02:18 -0400
From:	Rik van Riel <riel@...hat.com>
To:	Johannes Weiner <hannes@...xchg.org>
CC:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Daisuke Nishimura <nishimura@....nes.nec.co.jp>,
	Balbir Singh <balbir@...ux.vnet.ibm.com>,
	Ying Han <yinghan@...gle.com>, Michal Hocko <mhocko@...e.cz>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Minchan Kim <minchan.kim@...il.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Mel Gorman <mgorman@...e.de>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: [rfc patch 1/6] memcg: remove unused retry signal from reclaim

On 05/12/2011 10:53 AM, Johannes Weiner wrote:
> If the memcg reclaim code detects the target memcg below its limit it
> exits and returns a guaranteed non-zero value so that the charge is
> retried.
>
> Nowadays, the charge side checks the memcg limit itself and does not
> rely on this non-zero return value trick.
>
> This patch removes it.  The reclaim code will now always return the
> true number of pages it reclaimed on its own.
>
> Signed-off-by: Johannes Weiner<hannes@...xchg.org>

Acked-by: Rik van Riel<riel@...hat.com>

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