linux-kernel - Re: [RFC][-mm] Memory controller hierarchy support (v1)

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Message-ID: <480AF43D.1090405@linux.vnet.ibm.com>
Date:	Sun, 20 Apr 2008 13:13:57 +0530
From:	Balbir Singh <balbir@...ux.vnet.ibm.com>
To:	Pavel Emelyanov <xemul@...nvz.org>
CC:	Paul Menage <menage@...gle.com>,
	YAMAMOTO Takashi <yamamoto@...inux.co.jp>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	containers@...ts.osdl.org,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Subject: Re: [RFC][-mm] Memory controller hierarchy support (v1)

Pavel Emelyanov wrote:
> 
> Are you going to split this patch? As is it looks rather huge :)
> 

Sure

>> TODO's/Open Questions
>>
>> 1. We need to hold cgroup_mutex while walking through the children
>>    in reclaim. We need to figure out the best way to do so. Should
>>    cgroups provide a helper function/macro for it?
>> 2. Do not allow children to have a limit greater than their parents.
>> 3. Allow the user to select if hierarchial support is required
>> 4. Fine tune reclaim from children logic
>>
> 
> I though about it recently. Can we have a cgroup file, which will
> control whether to attach a res_counter to the parent? This will
> address the YEMEMOTO's question about the performance.
> 

It's one of the TODOS

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