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Date:	Tue, 19 Aug 2008 09:31:24 +0530
From:	Balbir Singh <balbir@...ux.vnet.ibm.com>
To:	Ryo Tsuruta <ryov@...inux.co.jp>
CC:	kamezawa.hiroyu@...fujitsu.com, xen-devel@...ts.xensource.com,
	containers@...ts.linux-foundation.org,
	linux-kernel@...r.kernel.org,
	virtualization@...ts.linux-foundation.org, dm-devel@...hat.com,
	agk@...rceware.org, xemul@...nvz.org, fernando@....ntt.co.jp
Subject: Re: [PATCH 4/7] bio-cgroup: Split the cgroup memory subsystem into
 two parts

Ryo Tsuruta wrote:
> Hi Kamezawa-san,
> 
>> I'm now writing remove-lock-page-cgroup patches. it works well.
>> please wait for a while...
> 
> I'm looking forward to those patches.
> 
> By the way, I'm glad if memory-cgroup has a feature which can make a
> page_cgroup move between cgroups with small overhead. It makes
> bio-cgroup improve the accuracy of tracking down pages.

Page movement can be a very expensive operation and is proportional to the size
of the control group. I think movement should be an optional feature, if we ever
add it.

-- 
	Balbir
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