linux-kernel - Re: [-mm] Disable the memory controller by default (v2)

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Date:	Tue, 08 Apr 2008 08:01:21 +0530
From:	Balbir Singh <balbir@...ux.vnet.ibm.com>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
CC:	andi@...stfloor.org, Andrew Morton <akpm@...ux-foundation.org>,
	YAMAMOTO Takashi <yamamoto@...inux.co.jp>,
	Paul Menage <menage@...gle.com>, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, Pavel Emelianov <xemul@...nvz.org>,
	hugh@...itas.com
Subject: Re: [-mm] Disable the memory controller by default (v2)

KAMEZAWA Hiroyuki wrote:
> On Mon, 07 Apr 2008 18:32:15 +0530
> Balbir Singh <balbir@...ux.vnet.ibm.com> wrote:
> 
>>
>> Changelog v1
>>
>> 1. Split cgroup_disable into cgroup_disable and cgroup_enable
>> 2. Remove cgroup_toggle
>>
>> Due to the overhead of the memory controller. The
>> memory controller is now disabled by default. This patch adds cgroup_enable.
>>
>> If everyone agrees on this approach and likes it, should we push this
>> into 2.6.25?
>>
>> Signed-off-by: Balbir Singh <balbir@...ux.vnet.ibm.com>
>> ---
> BTW, how the user can know which controllers are on/off at default ?
> All controllers are off ?
> 

/proc/cgroups has an enabled field (fourth one). That should show what is
enabled/disabled. I've also documented it in
Documentation/kernel-parameters.txt. I intend to enable the memory controller
again, once we bring down the overhead.

-- 
	Warm Regards,
	Balbir Singh
	Linux Technology Center
	IBM, ISTL
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