Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752460Ab0DIDE7 (ORCPT ); Thu, 8 Apr 2010 23:04:59 -0400 Received: from fgwmail6.fujitsu.co.jp ([192.51.44.36]:52145 "EHLO fgwmail6.fujitsu.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751924Ab0DIDE4 (ORCPT ); Thu, 8 Apr 2010 23:04:56 -0400 X-SecurityPolicyCheck-FJ: OK by FujitsuOutboundMailChecker v1.3.1 Date: Fri, 9 Apr 2010 12:01:04 +0900 From: KAMEZAWA Hiroyuki To: Daisuke Nishimura Cc: "linux-mm@kvack.org" , "akpm@linux-foundation.org" , "balbir@linux.vnet.ibm.com" , randy.dunlap@oracle.com, "linux-kernel@vger.kernel.org" Subject: Re: [PATCH] memcg: update documentation v3 Message-Id: <20100409120104.9db5b88c.kamezawa.hiroyu@jp.fujitsu.com> In-Reply-To: <20100409111145.5359a872.nishimura@mxp.nes.nec.co.jp> References: <20100408145800.ca90ad81.kamezawa.hiroyu@jp.fujitsu.com> <20100409102626.11f8b8b6.nishimura@mxp.nes.nec.co.jp> <20100409104556.2aa6399d.kamezawa.hiroyu@jp.fujitsu.com> <20100409111145.5359a872.nishimura@mxp.nes.nec.co.jp> Organization: FUJITSU Co. LTD. X-Mailer: Sylpheed 3.0.2 (GTK+ 2.10.14; i686-pc-mingw32) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2666 Lines: 66 On Fri, 9 Apr 2010 11:11:45 +0900 Daisuke Nishimura wrote: > On Fri, 9 Apr 2010 10:45:56 +0900, KAMEZAWA Hiroyuki wrote: > > On Fri, 9 Apr 2010 10:26:26 +0900 > > Daisuke Nishimura wrote: > > > > +Current Status: linux-2.6.34-mmotm(development version of 2010/April) > > > > + > > > > +Features: > > > > + - accounting anonymous pages, file caches, swap caches usage and limit them. > > > > + - private LRU and reclaim routine. (system's global LRU and private LRU > > > > + work independently from each other) > > > > + - optionally, memory+swap usage can be accounted and limited. > > > > + - hierarchical accounting > > > > + - soft limit > > > > + - moving(recharging) account at moving a task is selectable. > > > > + - usage threshold notifier > > > > + - oom-killer disable knob and oom-notifier > > > > + - Root cgroup has no limit controls. > > > > + > > > > + Kernel memory and Hugepages are not under control yet. We just manage > > > > + pages on LRU. To add more controls, we have to take care of performance. > > > > + > > > > +Brief summary of control files. > > > > + > > > > + tasks # attach a task(thread) > > > > + cgroup.procs # attach a process(all threads under it) > > > IIUC, writing to cgroup.procs isn't supported yet. So, I think we don't have to > > > bother explaining cgroup.procs here. > > > > > > > It's supported. See Documetaion/cgroup/cgroup.txt > > IIRC, I use cgroup.procs file for migrating, sometimes. > > > I can't write to it now. > > # echo $$ >/cgroup/memory/01/cgroup.procs > -bash: echo: write error: Invalid argument > # ls -l /cgroup/memory/01/cgroup.procs > -r--r--r-- 1 root root 0 2010-04-09 10:41 /cgroup/memory/01/cgroup.procs > # uname -a > Linux GibsonE 2.6.34-rc3-mm1-00432-g37c11f5 #1 SMP Thu Apr 8 11:03:39 JST 2010 x86_64 x86_64 x86_64 GNU/Linux > > And kernel/cgroup.c says: > > 3161 { > 3162 .name = CGROUP_FILE_GENERIC_PREFIX "procs", > 3163 .open = cgroup_procs_open, > 3164 /* .write_u64 = cgroup_procs_write, TODO */ > 3165 .release = cgroup_pidlist_release, > 3166 .mode = S_IRUGO, > 3167 }, > > IIRC, it's supported once, but the patch was dropped. > Ouch....I have to fix (our internal) user manual, too..... Thanks, -Kame -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/