linux-kernel - Re: [RFC] [PATCH -mm] cgroup: limit the amount of dirty file pages

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Date:	Wed, 10 Sep 2008 01:26:33 +0900 (JST)
From:	kamezawa.hiroyu@...fujitsu.com
To:	righi.andrea@...il.com
Cc:	Balbir Singh <balbir@...ux.vnet.ibm.com>,
	Paul Menage <menage@...gle.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Dave Hansen <dave@...ux.vnet.ibm.com>,
	Carl Henrik Lunde <chlunde@...g.uio.no>,
	Divyesh Shah <dpshah@...gle.com>,
	Naveen Gupta <ngupta@...gle.com>,
	Fernando Luis V?zquez Cao <fernando@....ntt.co.jp>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Hirokazu Takahashi <taka@...inux.co.jp>,
	Marco Innocenti <m.innocenti@...eca.it>,
	Satoshi UCHIDA <s-uchida@...jp.nec.com>,
	Ryo Tsuruta <ryov@...inux.co.jp>,
	Vivek Goyal <vgoyal@...hat.com>,
	Matt Heaton <matt@...ehost.com>,
	David Radford <dradford@...ehost.com>,
	containers@...ts.linux-foundation.org,
	LKML <linux-kernel@...r.kernel.org>, linux-mm@...ck.org
Subject: Re: [RFC] [PATCH -mm] cgroup: limit the amount of dirty file pages

----- Original Message -----
>This is a totally experimental patch against 2.6.27-rc5-mm1.
>
>It allows to control how much dirty file pages a cgroup can have at any
>given time. This feature is supposed to be strictly connected to a
>generic cgroup IO controller (see below).
>
>Interface: a new entry "filedirty" is added to the file memory.stat,
>reporting the number of dirty file pages (in pages), and a new file
>memory.file_dirty_limit_in_pages is added in the cgroup filesystem to
>show/set the current limit.
>
Before staring patch review, why not dirty_ratio per memcg ?
Is there difficult implementation issue ?

Thanks,
-Kame
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