From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750732AbWFBAiM (ORCPT ); Thu, 1 Jun 2006 20:38:12 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750756AbWFBAiM (ORCPT ); Thu, 1 Jun 2006 20:38:12 -0400 Received: from mail10.syd.optusnet.com.au ([211.29.132.191]:9633 "EHLO mail10.syd.optusnet.com.au") by vger.kernel.org with ESMTP id S1750732AbWFBAiL (ORCPT ); Thu, 1 Jun 2006 20:38:11 -0400 From: Con Kolivas To: sekharan@us.ibm.com Subject: Re: sched: Add CPU rate hard caps Date: Fri, 2 Jun 2006 10:36:15 +1000 User-Agent: KMail/1.9.1 Cc: balbir@in.ibm.com, dev@openvz.org, Andrew Morton , Srivatsa , Sam Vilain , ckrm-tech@lists.sourceforge.net, Balbir Singh , Mike Galbraith , Peter Williams , Linux Kernel , Kingsley Cheung , "Eric W. Biederman" , Ingo Molnar , Rene Herman , Jens Axboe References: <20060526042021.2886.4957.sendpatchset@heathwren.pw.nest> <447EA694.8060407@in.ibm.com> <1149187413.13336.24.camel@linuxchandra> In-Reply-To: <1149187413.13336.24.camel@linuxchandra> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200606021036.17021.kernel@kolivas.org> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Friday 02 June 2006 04:43, Chandra Seetharaman wrote: > On Thu, 2006-06-01 at 14:04 +0530, Balbir Singh wrote: > > > - disk I/O bandwidth: > > > we started to use CFQv2, but it is quite poor in this regard. First, it > > > doesn't prioritizes writes and async disk operations :( And even for > > > sync reads we found some problems we work on now... > > CKRM (on e-series) had an implementation based on a modified CFQ > scheduler. Shailabh is currently working on porting that controller to > f-series. I hope that the changes you have to improve CFQ were done in a way that is suitable for mainline and you're planning to try and merge them there. -- -ck