linux-kernel - Re: [RFC][1/3] Add user interface for virtual address space control (v2)

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Message-ID: <47EB6D00.5070306@linux.vnet.ibm.com>
Date:	Thu, 27 Mar 2008 15:16:40 +0530
From:	Balbir Singh <balbir@...ux.vnet.ibm.com>
To:	Pavel Emelyanov <xemul@...nvz.org>
CC:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Hugh Dickins <hugh@...itas.com>,
	Sudhir Kumar <skumar@...ux.vnet.ibm.com>,
	YAMAMOTO Takashi <yamamoto@...inux.co.jp>,
	Paul Menage <menage@...gle.com>, lizf@...fujitsu.com,
	linux-kernel@...r.kernel.org, taka@...inux.co.jp,
	linux-mm@...ck.org, David Rientjes <rientjes@...gle.com>
Subject: Re: [RFC][1/3] Add user interface for virtual address space control
 (v2)

Pavel Emelyanov wrote:
> KAMEZAWA Hiroyuki wrote:
>> On Thu, 27 Mar 2008 00:20:06 +0530
>> Balbir Singh <balbir@...ux.vnet.ibm.com> wrote:
>>
>>> Add as_usage_in_bytes and as_limit_in_bytes interfaces. These provide
>>> control over the total address space that the processes combined together
>>> in the cgroup can grow upto. This functionality is analogous to
>>> the RLIMIT_AS function of the getrlimit(2) and setrlimit(2) calls.
>>> A as_res resource counter is added to the mem_cgroup structure. The
>>> as_res counter handles all the accounting associated with the virtual
>>> address space accounting and control of cgroups.
>>>
>>> Signed-off-by: Balbir Singh <balbir@...ux.vnet.ibm.com>
>> I wonder that it's better to create "rlimit cgroup" rather than enhancing
>> memory controller. (But I have no strong opinion.)
>> How do you think ?
> 
> I believe that all memory management is better to have in one controller...
> 

Paul wants to see it in a different controller. He has been reasoning it out in
another email thread.

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