From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030779AbXDKD6b (ORCPT ); Tue, 10 Apr 2007 23:58:31 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1030795AbXDKD6b (ORCPT ); Tue, 10 Apr 2007 23:58:31 -0400 Received: from smtp.ustc.edu.cn ([202.38.64.16]:56823 "HELO ustc.edu.cn" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with SMTP id S1030779AbXDKD63 (ORCPT ); Tue, 10 Apr 2007 23:58:29 -0400 Message-ID: <376263890.06140@ustc.edu.cn> X-EYOUMAIL-SMTPAUTH: wfg@mail.ustc.edu.cn Date: Wed, 11 Apr 2007 11:54:48 +0800 From: WU Fengguang To: Andrew Morton Cc: Andi Kleen , Jan Kara , linux-kernel@vger.kernel.org, npiggin@suse.de Subject: Re: [PATCH] Improve heuristic detecting sequential reads Message-ID: <20070411035448.GA4724@mail.ustc.edu.cn> Mail-Followup-To: Andrew Morton , Andi Kleen , Jan Kara , linux-kernel@vger.kernel.org, npiggin@suse.de References: <20070410155411.GF13445@duck.suse.cz> <20070410164540.6d10ddd7.akpm@linux-foundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20070410164540.6d10ddd7.akpm@linux-foundation.org> X-GPG-Fingerprint: 53D2 DDCE AB5C 8DC6 188B 1CB1 F766 DA34 8D8B 1C6D User-Agent: Mutt/1.5.13 (2006-08-11) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Apr 10, 2007 at 04:45:40PM -0700, Andrew Morton wrote: > On 11 Apr 2007 00:56:51 +0200 > Andi Kleen wrote: > > > There's a much more complete patchkit for this that gets reposted > > regularly on l-k. Perhaps it would make sense to test that first? > > adaptive readahead? Has been in -mm for a year. Problem is, it is > _so_ complete that I just don't know how to merge it. It's huge, and > only Wu understands it. So it's really rather stuck. Yeah, it is. I'll come up with a minimal patch to first simplify the current readahead algorithm. The code is ready, if ignoring the document ;-) Wu