From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S265400AbUBCBBz (ORCPT ); Mon, 2 Feb 2004 20:01:55 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S265587AbUBCBBz (ORCPT ); Mon, 2 Feb 2004 20:01:55 -0500 Received: from s4.uklinux.net ([80.84.72.14]:51352 "EHLO mail2.uklinux.net") by vger.kernel.org with ESMTP id S265400AbUBCBBw (ORCPT ); Mon, 2 Feb 2004 20:01:52 -0500 To: Andrew Morton Cc: Nick Piggin , linux-kernel@vger.kernel.org Subject: Re: 2.6.1 slower than 2.4, smp/scsi/sw-raid/reiserfs References: <87oesieb75.fsf@codematters.co.uk> <20040201151111.4a6b64c3.akpm@osdl.org> <401D9154.9060903@cyberone.com.au> <87llnm482q.fsf@codematters.co.uk> <401DDCD7.3010902@cyberone.com.au> <401E1131.6030608@cyberone.com.au> <87d68xcoqi.fsf@codematters.co.uk> <401EDEF2.6090802@cyberone.com.au> <20040202154959.283cf60b.akpm@osdl.org> From: Philip Martin Date: Tue, 03 Feb 2004 01:01:20 +0000 In-Reply-To: <20040202154959.283cf60b.akpm@osdl.org> (Andrew Morton's message of "Mon, 2 Feb 2004 15:49:59 -0800") Message-ID: <87isipvuvz.fsf@codematters.co.uk> User-Agent: Gnus/5.1002 (Gnus v5.10.2) XEmacs/21.4 (Common Lisp, linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Andrew Morton writes: > Nick Piggin wrote: >> >> Andrew, any other ideas? > > There seems to be a lot more writeout happening. As far as I can see (and hear!) that's true. > You could try setting /proc/sys/vm/dirty_ratio to 60 and > /proc/sys/vm/dirty_background_ratio to 40. Not much different: 2.6.1 (without elevator=deadline) dirty_ratio:60 dirty_background_ratio:40 245.58user 121.82system 3:31.79elapsed 173%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (0major+3771340minor)pagefaults 0swaps dirty_ratio:40 dirty_background_ratio:10 (the defaults) 245.75user 121.33system 3:35.13elapsed 170%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (0major+3770826minor)pagefaults 0swaps -- Philip Martin