From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751680AbZH1E3W (ORCPT ); Fri, 28 Aug 2009 00:29:22 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751625AbZH1E3W (ORCPT ); Fri, 28 Aug 2009 00:29:22 -0400 Received: from e28smtp01.in.ibm.com ([59.145.155.1]:60143 "EHLO e28smtp01.in.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751641AbZH1E3V (ORCPT ); Fri, 28 Aug 2009 00:29:21 -0400 Date: Fri, 28 Aug 2009 09:58:36 +0530 From: Balbir Singh To: KAMEZAWA Hiroyuki Cc: "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" , "nishimura@mxp.nes.nec.co.jp" Subject: Re: [RFC][PATCH 0/5] memcg: reduce lock conetion Message-ID: <20090828042836.GD4889@balbir.in.ibm.com> Reply-To: balbir@linux.vnet.ibm.com References: <20090828132015.10a42e40.kamezawa.hiroyu@jp.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline In-Reply-To: <20090828132015.10a42e40.kamezawa.hiroyu@jp.fujitsu.com> User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * KAMEZAWA Hiroyuki [2009-08-28 13:20:15]: > Hi, > > Recently, memcg's res_counter->lock contention on big server is reported and > Balbir wrote a workaround for root memcg. > It's good but we need some fix for children, too. > > This set is for reducing lock conetion of memcg's children cgroup based on mmotm-Aug27. > > I'm sorry I have only 8cpu machine and can't reproduce very troublesome lock conention. > Here is lock_stat of make -j 12 on my 8cpu box, befre-after this patch series. > Kamezawa-San, I've been unable to get mmotm to boot (24th August, I'll try the 27th Aug and debug). Once that is done, I'll test on a large machine. -- Balbir