From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262041AbTLSIJr (ORCPT ); Fri, 19 Dec 2003 03:09:47 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262051AbTLSIJq (ORCPT ); Fri, 19 Dec 2003 03:09:46 -0500 Received: from holomorphy.com ([199.26.172.102]:12694 "EHLO holomorphy.com") by vger.kernel.org with ESMTP id S262041AbTLSIJq (ORCPT ); Fri, 19 Dec 2003 03:09:46 -0500 Date: Fri, 19 Dec 2003 00:09:40 -0800 From: William Lee Irwin III To: Yun Zhou Cc: linux-kernel@vger.kernel.org Subject: Re: HD access sluggish in 2.6.0 Message-ID: <20031219080940.GG31393@holomorphy.com> Mail-Followup-To: William Lee Irwin III , Yun Zhou , linux-kernel@vger.kernel.org References: <200312181957.05917.sraphim@mofd.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200312181957.05917.sraphim@mofd.net> Organization: The Domain of Holomorphy User-Agent: Mutt/1.5.4i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Dec 18, 2003 at 07:57:05PM -0600, Yun Zhou wrote: > I'm using a system with 1HD (DC WD600BB-00CAA1 60 GB) using kernel 2.6.0. > Whenever the system uses the disk extensively (copying a file, untarring, > etc.), it grinds to a near halt, with the CPU usage at about 100%, even for a > simple copying operation. > This problem is not present when using 2.4.22, nor any of the 2.4 series > kernels that I've tried. Does anyone know what is causing this? > Thanks in advance! This is typical of IDE disks where the driver is pessimistically using PIO. A dmesg and .config would help, plus maybe readprofile(1) results (you'll have to boot with profile=1 on the kernel command-line.) just in case it's actually something else. -- wli