From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756344AbWK0DT0 (ORCPT ); Sun, 26 Nov 2006 22:19:26 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756349AbWK0DT0 (ORCPT ); Sun, 26 Nov 2006 22:19:26 -0500 Received: from nf-out-0910.google.com ([64.233.182.190]:46426 "EHLO nf-out-0910.google.com") by vger.kernel.org with ESMTP id S1756325AbWK0DTZ (ORCPT ); Sun, 26 Nov 2006 22:19:25 -0500 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:user-agent:mime-version:to:cc:subject:references:in-reply-to:content-type:content-transfer-encoding; b=O6ZIJhnmdWFvfIB90crFkT0GAWUqZeP2LmG7obShWcagz3vXwJePoXJCw01NykuyN+7bI4k2xEDq8zdMEuwKVSuym2buahNinoCnaefyaacVIxDCa/TRbrJf8/b5Kjdv8fjJfOcNRZerfCSgL9QaskCZ+0o3HgCWydE6IU+lGo8= Message-ID: <456A5936.9080903@gmail.com> Date: Mon, 27 Nov 2006 12:19:18 +0900 From: Tejun Heo User-Agent: Icedove 1.5.0.8 (X11/20061116) MIME-Version: 1.0 To: "gary.czek" CC: linux-kernel@vger.kernel.org Subject: Re: ICH6M SATA Controller, SATA2 NCQ disk and high iowait CPU time References: <1164404380.20334.37.camel@localhost> In-Reply-To: <1164404380.20334.37.camel@localhost> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org gary.czek wrote: > Hi, I have problem with my notebook Fujitsu-Siemens V8010. It has Intel > ICH6M chipset with SATA Controller. And SATA II disk Fujitsu MHT2040BH > with NCQ. If there is request on disk, iowait time of CPU gets to 100% > and whole system gets totally unresponsible. For example apt upgrade (of > average 10 packages totaling 30MB in .debs) gets 30 minutes. CPU iowait > time gets about 95% for whole 30 minutes. > > My notebook details: > CPU: Intel Celeron M 1,4GHz > MEM: 256MB 333MHz > HDD: Fujitsu MHT2040BH SATA II, NCQ, 5400rpm, 8MB buffer > SWP: 512MB swap partition > Chipset: ICH6M 82801FBM > GPU: Intel i915GM integrated > > kernel: 2.6.19-rc5 > SATA Controller/disk driver: ata_piix and ahci tested, but results of > both were almost the same. 1. does 'mount -o remount,barrier=0 /' change anything? 2. 256MB is really small if you're running modern desktop environment. Please post the result of 'vmstat 5' while the machine is really slow. -- tejun