linux-kernel - Re: [-mm PATCH 6/8] Memory controller add per container LRU and reclaim (v2)

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Message-ID: <4693A813.7090005@linux.vnet.ibm.com>
Date:	Tue, 10 Jul 2007 21:08:59 +0530
From:	Balbir Singh <balbir@...ux.vnet.ibm.com>
To:	YAMAMOTO Takashi <yamamoto@...inux.co.jp>
CC:	svaidy@...ux.vnet.ibm.com, akpm@...ux-foundation.org,
	xemul@...nvz.org, a.p.zijlstra@...llo.nl,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	ebiederm@...ssion.com, containers@...ts.osdl.org, menage@...gle.com
Subject: Re: [-mm PATCH 6/8] Memory controller add per container LRU and reclaim
 (v2)

YAMAMOTO Takashi wrote:
>> Add the meta_page to the per container LRU. The reclaim algorithm has been
>> modified to make the isolate_lru_pages() as a pluggable component. The
>> scan_control data structure now accepts the container on behalf of which
>> reclaims are carried out. try_to_free_pages() has been extended to become
>> container aware.
>>
>> Signed-off-by: Balbir Singh <balbir@...ux.vnet.ibm.com>
> 
> it seems that the number of pages to scan (nr_active/nr_inactive
> in shrink_zone) is calculated from NR_ACTIVE and NR_INACTIVE of the zone,
> even in the case of per-container reclaim.  is it intended?
> 
> YAMAMOTO Takashi

Good catch again! We do that for now since the per zone LRU is a superset
of the container LRU. I see this as an important TODO item for us -- to
move to reclaim statistics based on per container nr_active and nr_inactive
(to be added).

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