linux-kernel - Re: [RFI] Shared accounting for memory resource controller

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Message-Id: <20090408161824.26f47077.kamezawa.hiroyu@jp.fujitsu.com>
Date:	Wed, 8 Apr 2009 16:18:24 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	balbir@...ux.vnet.ibm.com
Cc:	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"lizf@...fujitsu.com" <lizf@...fujitsu.com>,
	Rik van Riel <riel@...riel.com>,
	Bharata B Rao <bharata.rao@...ibm.com>,
	Dhaval Giani <dhaval@...ux.vnet.ibm.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [RFI] Shared accounting for memory resource controller

On Wed, 8 Apr 2009 12:41:15 +0530
Balbir Singh <balbir@...ux.vnet.ibm.com> wrote:

> * KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> [2009-04-08 16:07:33]:
> 1. First our rss in memory.stat is confusing, we should call it anon
> RSS
ok. but ....changing current interface ?

> 2. We need to add file rss, this is sort of inline with the
> information we export per process file_rss and anon_rss

maybe good. *but* active/incative ratio in lru file cache is good estimation for this.

> 3. Using the above, we can then try to (using an algorithm you
> proposed), try to do some work for figuring out the shared percentage.
> 
This is the point. At last. Why "# of shared pages" is important ?

I wonder it's better to add new stat file as memory.cacheinfo which helps
following kind of commands.

  #cacheinfo /cgroups/memory/group01/
       /usr/lib/libc.so.1     30pages
       /var/log/messages      1 pages
       /tmp/xxxxxx            20 pages
       .....
       .....

Thanks,
-Kame

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