From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S265904AbUBCHG3 (ORCPT ); Tue, 3 Feb 2004 02:06:29 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S265906AbUBCHG3 (ORCPT ); Tue, 3 Feb 2004 02:06:29 -0500 Received: from fw.osdl.org ([65.172.181.6]:63634 "EHLO mail.osdl.org") by vger.kernel.org with ESMTP id S265904AbUBCHG1 (ORCPT ); Tue, 3 Feb 2004 02:06:27 -0500 Date: Mon, 2 Feb 2004 23:07:45 -0800 From: Andrew Morton To: Samium Gromoff Cc: linux-kernel@vger.kernel.org, philip@codematters.co.uk Subject: Re: 2.6.1 slower than 2.4, smp/scsi/sw-raid/reiserfs Message-Id: <20040202230745.237dd5b6.akpm@osdl.org> In-Reply-To: <87smhsy7n4.wl@canopus.ns.zel.ru> References: <87smhsy7n4.wl@canopus.ns.zel.ru> X-Mailer: Sylpheed version 0.9.4 (GTK+ 1.2.10; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Samium Gromoff wrote: > > > > > The machine is a dual P3 450MHz, 512MB, aic7xxx, 2 disk RAID-0 and > > > ReiserFS. It's a few years old and has always run Linux, most > > > recently 2.4.24. I decided to try 2.6.1 and the performance is > > > disappointing. > > > > 2.6 has a few performance problems under heavy pageout at present. Nick > > Piggin has some patches which largely fix it up. > > I`m sorry, but this is misguiding. 2.6 does not have a few performance > problems under heavy pageout. > As you have frequently and somewhat redundantly reminded us. Perhaps you could test Nick's patches. They are at http://www.kerneltrap.org/~npiggin/vm/ Against 2.6.2-rc2-mm2. First revert vm-rss-limit-enforcement.patch, then apply those three.