linux-kernel - Re: [PATCH 3/5] page_cgroup: make page tracking available for blkio

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Date:	Tue, 22 Feb 2011 16:21:47 -0700
From:	Jonathan Corbet <corbet@....net>
To:	Vivek Goyal <vgoyal@...hat.com>
Cc:	Andrea Righi <arighi@...eler.com>,
	Balbir Singh <balbir@...ux.vnet.ibm.com>,
	Daisuke Nishimura <nishimura@....nes.nec.co.jp>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Greg Thelen <gthelen@...gle.com>,
	Wu Fengguang <fengguang.wu@...el.com>,
	Gui Jianfeng <guijianfeng@...fujitsu.com>,
	Ryo Tsuruta <ryov@...inux.co.jp>,
	Hirokazu Takahashi <taka@...inux.co.jp>,
	Jens Axboe <axboe@...nel.dk>,
	Andrew Morton <akpm@...ux-foundation.org>,
	containers@...ts.linux-foundation.org, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/5] page_cgroup: make page tracking available for blkio

On Tue, 22 Feb 2011 18:06:30 -0500
Vivek Goyal <vgoyal@...hat.com> wrote:

> I think John suggested replacing mem_cgroup pointer with css_set so that
> size of the strcuture does not increase but it leads extra level of 
> indirection.

That is what I was thinking.  But I did also say it's probably premature
generalization at this point, especially given that there'd be a runtime
cost.

jon
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