From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755096Ab1HZNTI (ORCPT ); Fri, 26 Aug 2011 09:19:08 -0400 Received: from casper.infradead.org ([85.118.1.10]:38319 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755091Ab1HZNTF convert rfc822-to-8bit (ORCPT ); Fri, 26 Aug 2011 09:19:05 -0400 Subject: Re: [PATCH 2/5] writeback: dirty position control From: Peter Zijlstra To: Wu Fengguang Cc: Vivek Goyal , "linux-fsdevel@vger.kernel.org" , Andrew Morton , Jan Kara , Christoph Hellwig , Dave Chinner , Greg Thelen , Minchan Kim , Andrea Righi , linux-mm , LKML Date: Fri, 26 Aug 2011 15:18:21 +0200 In-Reply-To: <20110826131341.GA7114@localhost> References: <20110823141504.GA15949@localhost> <20110823174757.GC15820@redhat.com> <20110824001257.GA6349@localhost> <1314202378.6925.48.camel@twins> <20110826001846.GA6118@localhost> <1314349469.26922.24.camel@twins> <20110826100428.GA7996@localhost> <20110826112637.GA17785@localhost> <1314360710.11049.1.camel@twins> <20110826122057.GA32711@localhost> <20110826131341.GA7114@localhost> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8BIT X-Mailer: Evolution 3.0.2- Message-ID: <1314364701.12445.0.camel@twins> Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 2011-08-26 at 21:13 +0800, Wu Fengguang wrote: > We got similar result as in the read disturber case, even though one > disturbs N and the other impacts writeout bandwith. The original > patchset is consistently performing much better :) It does indeed, and I figure on these timescales it makes sense to assumes N is a constant. Fair enough, thanks! From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail6.bemta12.messagelabs.com (mail6.bemta12.messagelabs.com [216.82.250.247]) by kanga.kvack.org (Postfix) with ESMTP id 6D8BA6B016A for ; Fri, 26 Aug 2011 09:19:21 -0400 (EDT) Subject: Re: [PATCH 2/5] writeback: dirty position control From: Peter Zijlstra Date: Fri, 26 Aug 2011 15:18:21 +0200 In-Reply-To: <20110826131341.GA7114@localhost> References: <20110823141504.GA15949@localhost> <20110823174757.GC15820@redhat.com> <20110824001257.GA6349@localhost> <1314202378.6925.48.camel@twins> <20110826001846.GA6118@localhost> <1314349469.26922.24.camel@twins> <20110826100428.GA7996@localhost> <20110826112637.GA17785@localhost> <1314360710.11049.1.camel@twins> <20110826122057.GA32711@localhost> <20110826131341.GA7114@localhost> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Message-ID: <1314364701.12445.0.camel@twins> Mime-Version: 1.0 Sender: owner-linux-mm@kvack.org List-ID: To: Wu Fengguang Cc: Vivek Goyal , "linux-fsdevel@vger.kernel.org" , Andrew Morton , Jan Kara , Christoph Hellwig , Dave Chinner , Greg Thelen , Minchan Kim , Andrea Righi , linux-mm , LKML On Fri, 2011-08-26 at 21:13 +0800, Wu Fengguang wrote: > We got similar result as in the read disturber case, even though one > disturbs N and the other impacts writeout bandwith. The original > patchset is consistently performing much better :)=20 It does indeed, and I figure on these timescales it makes sense to assumes N is a constant. Fair enough, thanks! -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org