From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751625AbZH1W1t (ORCPT ); Fri, 28 Aug 2009 18:27:49 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751294AbZH1W1t (ORCPT ); Fri, 28 Aug 2009 18:27:49 -0400 Received: from mx1.redhat.com ([209.132.183.28]:64212 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751154AbZH1W1s (ORCPT ); Fri, 28 Aug 2009 18:27:48 -0400 Message-ID: <4A9859B0.6090906@redhat.com> Date: Fri, 28 Aug 2009 18:26:56 -0400 From: Rik van Riel Organization: Red Hat, Inc User-Agent: Thunderbird 2.0.0.17 (X11/20080915) MIME-Version: 1.0 To: Vivek Goyal CC: linux-kernel@vger.kernel.org, jens.axboe@oracle.com, containers@lists.linux-foundation.org, dm-devel@redhat.com, nauman@google.com, dpshah@google.com, lizf@cn.fujitsu.com, mikew@google.com, fchecconi@gmail.com, paolo.valente@unimore.it, ryov@valinux.co.jp, 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, m-ikeda@ds.jp.nec.com, agk@redhat.com, akpm@linux-foundation.org, peterz@infradead.org, jmarchan@redhat.com, torvalds@linux-foundation.org, mingo@elte.hu Subject: Re: [PATCH 02/23] io-controller: Core of the elevator fair queuing References: <1251495072-7780-1-git-send-email-vgoyal@redhat.com> <1251495072-7780-3-git-send-email-vgoyal@redhat.com> In-Reply-To: <1251495072-7780-3-git-send-email-vgoyal@redhat.com> 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 Vivek Goyal wrote: > o This is core of the io scheduler implemented at elevator layer. This is a mix > of cpu CFS scheduler and CFQ IO scheduler. Some of the bits from CFS have > to be derived so that we can support hierarchical scheduling. Without > cgroups or with-in group, we should essentially get same behavior as CFQ. > > o This patch only shows non-hierarchical bits. Hierarhical code comes in later > patches. > > o This code is the building base of introducing fair queuing logic in common > elevator layer so that it can be used by all the four IO schedulers. > > Signed-off-by: Fabio Checconi > Signed-off-by: Paolo Valente > Signed-off-by: Nauman Rafique > Signed-off-by: Vivek Goyal Acked-by: Rik van Riel -- All rights reversed. From mboxrd@z Thu Jan 1 00:00:00 1970 From: Rik van Riel Subject: Re: [PATCH 02/23] io-controller: Core of the elevator fair queuing Date: Fri, 28 Aug 2009 18:26:56 -0400 Message-ID: <4A9859B0.6090906@redhat.com> References: <1251495072-7780-1-git-send-email-vgoyal@redhat.com> <1251495072-7780-3-git-send-email-vgoyal@redhat.com> Reply-To: device-mapper development Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1251495072-7780-3-git-send-email-vgoyal@redhat.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com To: Vivek Goyal Cc: dhaval@linux.vnet.ibm.com, peterz@infradead.org, dm-devel@redhat.com, dpshah@google.com, jens.axboe@oracle.com, agk@redhat.com, balbir@linux.vnet.ibm.com, paolo.valente@unimore.it, jmarchan@redhat.com, guijianfeng@cn.fujitsu.com, fernando@oss.ntt.co.jp, mikew@google.com, jmoyer@redhat.com, nauman@google.com, mingo@elte.hu, m-ikeda@ds.jp.nec.com, lizf@cn.fujitsu.com, fchecconi@gmail.com, s-uchida@ap.jp.nec.com, containers@lists.linux-foundation.org, linux-kernel@vger.kernel.org, akpm@linux-foundation.org, righi.andrea@gmail.com, torvalds@linux-foundation.org List-Id: dm-devel.ids Vivek Goyal wrote: > o This is core of the io scheduler implemented at elevator layer. This is a mix > of cpu CFS scheduler and CFQ IO scheduler. Some of the bits from CFS have > to be derived so that we can support hierarchical scheduling. Without > cgroups or with-in group, we should essentially get same behavior as CFQ. > > o This patch only shows non-hierarchical bits. Hierarhical code comes in later > patches. > > o This code is the building base of introducing fair queuing logic in common > elevator layer so that it can be used by all the four IO schedulers. > > Signed-off-by: Fabio Checconi > Signed-off-by: Paolo Valente > Signed-off-by: Nauman Rafique > Signed-off-by: Vivek Goyal Acked-by: Rik van Riel -- All rights reversed.