From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755786AbYFJFOy (ORCPT ); Tue, 10 Jun 2008 01:14:54 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751199AbYFJFOr (ORCPT ); Tue, 10 Jun 2008 01:14:47 -0400 Received: from e28smtp04.in.ibm.com ([59.145.155.4]:44156 "EHLO e28esmtp04.in.ibm.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751096AbYFJFOq (ORCPT ); Tue, 10 Jun 2008 01:14:46 -0400 Message-ID: <484E0DB4.4070508@linux.vnet.ibm.com> Date: Tue, 10 Jun 2008 10:44:28 +0530 From: Balbir Singh Reply-To: balbir@linux.vnet.ibm.com Organization: IBM User-Agent: Thunderbird 2.0.0.14 (X11/20080501) MIME-Version: 1.0 To: Andrea Righi CC: menage@google.com, matt@bluehost.com, roberto@unbit.it, randy.dunlap@oracle.com, akpm@linux-foundation.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 0/3] cgroup: block device i/o bandwidth controller (v2) References: <> <1212791250-32320-1-git-send-email-righi.andrea@gmail.com> In-Reply-To: <1212791250-32320-1-git-send-email-righi.andrea@gmail.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Andrea Righi wrote: > The goal of the i/o bandwidth controller is to improve i/o performance > predictability and provide better QoS for different cgroups sharing the same > block devices. > > Respect to other priority/weight-based solutions the approach used by this > controller is to explicitly choke applications' requests that directly (or > indirectly) generate i/o activity in the system. > > The direct bandwidth limiting method has the advantage of improving the > performance predictability at the cost of reducing, in general, the overall > performance of the system (in terms of throughput). > > Detailed informations about design, its goal and usage are described in the > documentation. > I'll read through the documentation and comment. > Tested against latest git (2.6.26-rc5). > > The all-in-one patch can be found at: > http://download.systemimager.org/~arighi/linux/patches/io-throttle/ > Cool! thanks for doing this, it's useful. > Previous version and test report can be found here: > http://lkml.org/lkml/2008/5/24/97 -- Warm Regards, Balbir Singh Linux Technology Center IBM, ISTL