linux-kernel - Re: [RFC][0/3] Virtual address space control for cgroups

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Date:	Mon, 17 Mar 2008 09:57:37 +0800
From:	"Paul Menage" <menage@...gle.com>
To:	"Li Zefan" <lizf@...fujitsu.com>
Cc:	"Balbir Singh" <balbir@...ux.vnet.ibm.com>, linux-mm@...ck.org,
	"Hugh Dickins" <hugh@...itas.com>,
	"Sudhir Kumar" <skumar@...ux.vnet.ibm.com>,
	"YAMAMOTO Takashi" <yamamoto@...inux.co.jp>,
	linux-kernel@...r.kernel.org, taka@...inux.co.jp,
	"David Rientjes" <rientjes@...gle.com>,
	"Pavel Emelianov" <xemul@...nvz.org>,
	"Andrew Morton" <akpm@...ux-foundation.org>,
	"KAMEZAWA Hiroyuki" <kamezawa.hiroyu@...fujitsu.com>
Subject: Re: [RFC][0/3] Virtual address space control for cgroups

On Mon, Mar 17, 2008 at 9:47 AM, Li Zefan <lizf@...fujitsu.com> wrote:
>
>  It will be code duplication to make it a new subsystem,

Would it? Other than the basic cgroup boilerplate, the only real
duplication that I could see would be that there'd need to be an
additional per-mm pointer back to the cgroup. (Which could be avoided
if we added a single per-mm pointer back to the "owning" task, which
would generally be the mm's thread group leader, so that you could go
quickly from an mm to a set of cgroup subsystems).

And the advantage would that you'd be able to more easily pick/choose
which bits of control you use (and pay for).

Paul
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