From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261537AbUBYTRV (ORCPT ); Wed, 25 Feb 2004 14:17:21 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261581AbUBYTRU (ORCPT ); Wed, 25 Feb 2004 14:17:20 -0500 Received: from fw.osdl.org ([65.172.181.6]:49343 "EHLO mail.osdl.org") by vger.kernel.org with ESMTP id S261540AbUBYTQM (ORCPT ); Wed, 25 Feb 2004 14:16:12 -0500 Date: Wed, 25 Feb 2004 11:16:33 -0800 From: Andrew Morton To: Cliff White Cc: linux-kernel@vger.kernel.org Subject: Re: reaim - 2.6.3-mm1 IO performance down. Message-Id: <20040225111633.46ddacc7.akpm@osdl.org> In-Reply-To: <200402251740.i1PHetn27447@mail.osdl.org> References: <20040224170337.798f5766.akpm@osdl.org> <200402251740.i1PHetn27447@mail.osdl.org> 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 Cliff White wrote: > > > Thanks. You could try reverting adaptive-lazy-readahead.patch. If it is > > not that I'd be suspecting CPU scheduler changes. Do you have uniprocessor > > test results? > > I have them for 2.6.3-mm3, am re-running 2.6.3-mm1 right now. > Gross results are within 1%, but looking at the detail, i do see badness, OK, I'll do the bsearch. Again. Could you please tell me what would be an appropriate reaim command line with which to reproduce this?