From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail144.messagelabs.com (mail144.messagelabs.com [216.82.254.51]) by kanga.kvack.org (Postfix) with SMTP id B47CF6B00AD for ; Sun, 8 Mar 2009 19:45:28 -0400 (EDT) Received: from mt1.gw.fujitsu.co.jp ([10.0.50.74]) by fgwmail7.fujitsu.co.jp (Fujitsu Gateway) with ESMTP id n28NjPGB011407 for (envelope-from kamezawa.hiroyu@jp.fujitsu.com); Mon, 9 Mar 2009 08:45:26 +0900 Received: from smail (m4 [127.0.0.1]) by outgoing.m4.gw.fujitsu.co.jp (Postfix) with ESMTP id B43D145DE54 for ; Mon, 9 Mar 2009 08:45:25 +0900 (JST) Received: from s4.gw.fujitsu.co.jp (s4.gw.fujitsu.co.jp [10.0.50.94]) by m4.gw.fujitsu.co.jp (Postfix) with ESMTP id 8050245DE4F for ; Mon, 9 Mar 2009 08:45:25 +0900 (JST) Received: from s4.gw.fujitsu.co.jp (localhost.localdomain [127.0.0.1]) by s4.gw.fujitsu.co.jp (Postfix) with ESMTP id 58060E38002 for ; Mon, 9 Mar 2009 08:45:25 +0900 (JST) Received: from m105.s.css.fujitsu.com (m105.s.css.fujitsu.com [10.249.87.105]) by s4.gw.fujitsu.co.jp (Postfix) with ESMTP id 012131DB803B for ; Mon, 9 Mar 2009 08:45:25 +0900 (JST) Date: Mon, 9 Mar 2009 08:44:04 +0900 From: KAMEZAWA Hiroyuki Subject: Re: [RFC][PATCH 3/3] memcg documenation soft limit (Yet Another One) Message-Id: <20090309084404.f7a19ad4.kamezawa.hiroyu@jp.fujitsu.com> In-Reply-To: <49B153A3.8090906@oracle.com> References: <20090306092323.21063.93169.sendpatchset@localhost.localdomain> <20090306185440.66b92ca3.kamezawa.hiroyu@jp.fujitsu.com> <20090306193438.8084837d.kamezawa.hiroyu@jp.fujitsu.com> <20090306193821.ca2fb628.kamezawa.hiroyu@jp.fujitsu.com> <49B153A3.8090906@oracle.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org To: Randy Dunlap Cc: Balbir Singh , linux-mm@kvack.org, Sudhir Kumar , YAMAMOTO Takashi , Bharata B Rao , Paul Menage , lizf@cn.fujitsu.com, linux-kernel@vger.kernel.org, KOSAKI Motohiro , David Rientjes , Pavel Emelianov , Dhaval Giani , Rik van Riel , Andrew Morton List-ID: On Fri, 06 Mar 2009 08:47:31 -0800 Randy Dunlap wrote: > KAMEZAWA Hiroyuki wrote: > > From: KAMEZAWA Hiroyuki Thank you. (and sorry -Kame > > > > Documentation for softlimit (3/3) > > > > Signed-off-by: KAMEZAWA Hiroyuki > > --- > > Documentation/cgroups/memory.txt | 19 +++++++++++++++++++ > > 1 file changed, 19 insertions(+) > > > > Index: mmotm-2.6.29-Mar3/Documentation/cgroups/memory.txt > > =================================================================== > > --- mmotm-2.6.29-Mar3.orig/Documentation/cgroups/memory.txt > > +++ mmotm-2.6.29-Mar3/Documentation/cgroups/memory.txt > > @@ -322,6 +322,25 @@ will be charged as a new owner of it. > > - a cgroup which uses hierarchy and it has child cgroup. > > - a cgroup which uses hierarchy and not the root of hierarchy. > > > > +5.4 softlimit > > + Memory cgroup supports softlimit and has 2 params for control. > > parameters > > > + - memory.softlimit_in_bytes > > + - softlimit to this cgroup. > softlimit for this cgroup > (i.e., no beginning '-' and no ending '.') > > > > + - memory.softlimit_priority. > > + - priority of this cgroup at softlimit reclaim. > priority of this cgroup at softlimit reclaim > > > + Allowed priority level is 3-0 and 3 is the lowest. > > Not very user friendly... > > > + If 0, this cgroup will not be target of softlimit. > > + > > + At memory shortage of the system (or local node/zone), softlimit helps > > + kswapd(), a global memory recalim kernel thread, and inform victim cgroup > > reclaim informs > > > + to be shrinked to kswapd. > > + > > + Victim selection logic: > > + The kernel searches from the lowest priroty(3) up to the highest(1). > > priority 0 ?? (from above) > > > + If it find a cgroup witch has memory larger than softlimit, steal memory > > finds which > > > + from it. > > + If multiple cgroups are on the same priority, each cgroup wil be a > > will > > > + victim in turn. > > > > 6. Hierarchy support > > > -- > ~Randy > -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org