From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964800AbWFHIu7 (ORCPT ); Thu, 8 Jun 2006 04:50:59 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S964801AbWFHIu7 (ORCPT ); Thu, 8 Jun 2006 04:50:59 -0400 Received: from smtp.ustc.edu.cn ([202.38.64.16]:26781 "HELO ustc.edu.cn") by vger.kernel.org with SMTP id S964800AbWFHIu7 (ORCPT ); Thu, 8 Jun 2006 04:50:59 -0400 Message-ID: <349756654.19100@ustc.edu.cn> X-EYOUMAIL-SMTPAUTH: wfg@mail.ustc.edu.cn Date: Thu, 8 Jun 2006 16:50:55 +0800 From: Fengguang Wu To: Voluspa Cc: akpm@osdl.org, arjan@infradead.org, Valdis.Kletnieks@vt.edu, diegocg@gmail.com, linux-kernel@vger.kernel.org Subject: Re: [PATCH] readahead: initial method - expected read size - fix fastcall Message-ID: <20060608085055.GA5917@mail.ustc.edu.cn> Mail-Followup-To: Fengguang Wu , Voluspa , akpm@osdl.org, arjan@infradead.org, Valdis.Kletnieks@vt.edu, diegocg@gmail.com, linux-kernel@vger.kernel.org References: <349406446.10828@ustc.edu.cn> <20060604020738.31f43cb0.akpm@osdl.org> <1149413103.3109.90.camel@laptopd505.fenrus.org> <20060605031720.0017ae5e.lista1@comhem.se> <349562623.17723@ustc.edu.cn> <20060608094356.5c1272cc.lista1@comhem.se> <349754431.09938@ustc.edu.cn> <20060608102802.6e07b148.lista1@comhem.se> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20060608102802.6e07b148.lista1@comhem.se> User-Agent: Mutt/1.5.11+cvs20060126 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Jun 08, 2006 at 10:28:02AM +0200, Voluspa wrote: > On Thu, 8 Jun 2006 16:13:52 +0800 Fengguang Wu wrote: > > It's interesting that copying of sparse file is more efficient with small > > readahead size :) I get the same conclusion, though with smaller differences: > > How on earth can you copy the file without overwriting the target /dev/null? Yes, it worked as expected. All the time. I'm running zsh, though bash is also tested ok. % cp --version cp (GNU coreutils) 5.96 Copyright (C) 2006 Free Software Foundation, Inc. Wu