linux-kernel - Re: [PATCH 0/3] fix stale swap cache account leak in memcg v7

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Date:	Wed, 13 May 2009 09:31:27 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	balbir@...ux.vnet.ibm.com
Cc:	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"nishimura@....nes.nec.co.jp" <nishimura@....nes.nec.co.jp>,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
	mingo@...e.hu,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 0/3] fix stale swap cache account leak  in memcg v7

On Tue, 12 May 2009 15:21:58 +0530
Balbir Singh <balbir@...ux.vnet.ibm.com> wrote:

> > The patch set includes followng
> >  [1/3] add mem_cgroup_is_activated() function. which tell us memcg is _really_ used.
> >  [2/3] fix swap cache handling race by avoidng readahead.
> >  [3/3] fix swap cache handling race by check swapcount again.
> > 
> > Result is good under my test.
> 
> What was the result (performance data impact) of disabling swap
> readahead? Otherwise, this looks the most reasonable set of patches
> for this problem.
> 
I'll measure some and report it in the next post.


Thanks,
-Kame

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