linux-kernel - Re: [RFC PATCH 0/5] memcg: VM overcommit accounting and handling

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Message-ID: <484E0D73.6010609@linux.vnet.ibm.com>
Date:	Tue, 10 Jun 2008 10:43:23 +0530
From:	Balbir Singh <balbir@...ux.vnet.ibm.com>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
CC:	Andrea Righi <righi.andrea@...il.com>, menage@...gle.com,
	kosaki.motohiro@...fujitsu.com, xemul@...nvz.org,
	linux-kernel@...r.kernel.org, containers@...ts.osdl.org
Subject: Re: [RFC PATCH 0/5] memcg: VM overcommit accounting and handling

KAMEZAWA Hiroyuki wrote:
> On Tue, 10 Jun 2008 01:32:58 +0200
> Andrea Righi <righi.andrea@...il.com> wrote:
> 
>> Provide distinct cgroup VM overcommit accounting and handling using the memory
>> resource controller.
>>
> 
> Could you explain the benefits of this even when we have memrlimit controller ?
> (If unsure, see 2.6.26-rc5-mm1 and search memrlimit controller.)
> 
> And this kind of virtual-address-handling things should be implemented on
> memrlimit controller (means not on memory-resource-controller.).
> It seems this patch doesn't need to handle page_group.
> 
> Considering hierarchy, putting several kinds of features on one controller is
> not good, I think. Balbir, how do you think ?
> 

I would tend to agree. With the memrlimit controller, can't we do this in user
space now? Figure out the overcommit value and based on that setup the memrlimit?


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