Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759556AbZJGQnz (ORCPT ); Wed, 7 Oct 2009 12:43:55 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1758826AbZJGQny (ORCPT ); Wed, 7 Oct 2009 12:43:54 -0400 Received: from mx1.redhat.com ([209.132.183.28]:55479 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755145AbZJGQnx (ORCPT ); Wed, 7 Oct 2009 12:43:53 -0400 Message-ID: <4ACCC4B7.4050805@redhat.com> Date: Wed, 07 Oct 2009 12:41:27 -0400 From: Rik van Riel Organization: Red Hat, Inc User-Agent: Thunderbird 2.0.0.17 (X11/20080915) MIME-Version: 1.0 To: Ryo Tsuruta CC: vgoyal@redhat.com, nauman@google.com, m-ikeda@ds.jp.nec.com, linux-kernel@vger.kernel.org, jens.axboe@oracle.com, containers@lists.linux-foundation.org, dm-devel@redhat.com, dpshah@google.com, lizf@cn.fujitsu.com, mikew@google.com, fchecconi@gmail.com, paolo.valente@unimore.it, fernando@oss.ntt.co.jp, s-uchida@ap.jp.nec.com, taka@valinux.co.jp, guijianfeng@cn.fujitsu.com, jmoyer@redhat.com, dhaval@linux.vnet.ibm.com, balbir@linux.vnet.ibm.com, righi.andrea@gmail.com, agk@redhat.com, akpm@linux-foundation.org, peterz@infradead.org, jmarchan@redhat.com, torvalds@linux-foundation.org, mingo@elte.hu, yoshikawa.takuya@oss.ntt.co.jp Subject: Re: IO scheduler based IO controller V10 References: <20091006.161744.189719641.ryov@valinux.co.jp> <20091006112201.GA27866@redhat.com> <20091007.233805.183040347.ryov@valinux.co.jp> In-Reply-To: <20091007.233805.183040347.ryov@valinux.co.jp> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1050 Lines: 27 Ryo Tsuruta wrote: > If once dm-ioband is integrated into the LVM tools and bandwidth can > be assigned per device by lvcreate, the use of dm-tools is no longer > required for users. A lot of large data center users have a SAN, with volume management handled SAN-side and dedicated LUNs for different applications or groups of applications. Because of alignment issues, they typically use filesystems directly on top of the LUNs, without partitions or LVM layers. We cannot rely on LVM for these systems, because people prefer not to use that. Besides ... isn't the goal of the cgroups io bandwidth controller to control the IO used by PROCESSES? If we want to control processes, why would we want the configuration to be applied to any other kind of object in the system? -- All rights reversed. -- 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/