linux-kernel - Re: [RFC][PATCH 7/8] memcg soft limit LRU reorder

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Date:	Tue, 31 Mar 2009 09:00:23 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	balbir@...ux.vnet.ibm.com
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"kosaki.motohiro@...fujitsu.com" <kosaki.motohiro@...fujitsu.com>,
	"nishimura@....nes.nec.co.jp" <nishimura@....nes.nec.co.jp>
Subject: Re: [RFC][PATCH 7/8] memcg soft limit LRU reorder

On Mon, 30 Mar 2009 13:22:46 +0530
Balbir Singh <balbir@...ux.vnet.ibm.com> wrote:

> * KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> [2009-03-27 14:12:25]:
> 
> > From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
> > 
> > This patch adds a function to change the LRU order of pages in global LRU
> > under control of memcg's victim of soft limit.
> > 
> > FILE and ANON victim is divided and LRU rotation will be done independently.
> > (memcg which only includes FILE cache or ANON can exists.)
> > 
> > The routine finds specfied number of pages from memcg's LRU and
> > move it to top of global LRU. They will be the first target of shrink_xxx_list.
> 
> This seems to be the core of the patch, but I don't like this very
> much. Moving LRU pages of the mem cgroup seems very subtle, why can't
> we directly use try_to_free_mem_cgroup_pages()?
> 
It ignores many things.

Thanks,
-Kame

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