linux-kernel - Re: [PATCH] Memory Resource Controller Add Boot Option

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Message-ID: <6599ad830802250932s5eaa3bcchbfc49fe0e76d3f7d@mail.gmail.com>
Date:	Mon, 25 Feb 2008 09:32:00 -0800
From:	"Paul Menage" <menage@...gle.com>
To:	balbir@...ux.vnet.ibm.com
Cc:	"Andrew Morton" <akpm@...ux-foundation.org>,
	"Hugh Dickins" <hugh@...itas.com>,
	"Sudhir Kumar" <skumar@...ux.vnet.ibm.com>,
	"YAMAMOTO Takashi" <yamamoto@...inux.co.jp>, lizf@...fujitsu.com,
	linux-kernel@...r.kernel.org, taka@...inux.co.jp,
	linux-mm@...ck.org, "David Rientjes" <rientjes@...gle.com>,
	"Pavel Emelianov" <xemul@...nvz.org>,
	"KAMEZAWA Hiroyuki" <kamezawa.hiroyu@...fujitsu.com>
Subject: Re: [PATCH] Memory Resource Controller Add Boot Option

On Mon, Feb 25, 2008 at 9:18 AM, Balbir Singh <balbir@...ux.vnet.ibm.com> wrote:
>
>  I thought about it, but it did not work out all that well. The reason being,
>  that the memory controller is called in from places besides cgroup.
>  mem_cgroup_charge_common() for example is called from several places in mm.
>  Calling into cgroups to check, enabled/disabled did not seem right.

You wouldn't need to call into cgroups - if it's a flag in the subsys
object (which is defined in memcontrol.c) you'd just say

if (mem_cgroup_subsys.disabled) {
...
}

I'll send out a prototype for comment.

Paul
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