Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751344AbWIURBR (ORCPT ); Thu, 21 Sep 2006 13:01:17 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751348AbWIURBR (ORCPT ); Thu, 21 Sep 2006 13:01:17 -0400 Received: from nz-out-0102.google.com ([64.233.162.200]:22725 "EHLO nz-out-0102.google.com") by vger.kernel.org with ESMTP id S1751344AbWIURBQ (ORCPT ); Thu, 21 Sep 2006 13:01:16 -0400 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=GsFopqA5HcYUwFQC3iD/PS3Z3wbSukWAQYGvYskoT80lOPKRuFnnowZrlgRNyhg+BjpyGfMxckRNTBAmnDvUtWR32fcf1wJyL56YjkL/DhVrGoRQqFRh+vbsf2yi9+CcMuRO2w44LpOxK6j6M/AIE5JchOKQwWB7wZXHSv12mPo= Message-ID: <4512C54B.9060705@gmail.com> Date: Fri, 22 Sep 2006 02:00:59 +0900 From: Tejun Heo User-Agent: Thunderbird 1.5.0.4 (X11/20060713) MIME-Version: 1.0 To: Andrew Lyon CC: linux-kernel@vger.kernel.org, Jens Axboe Subject: Re: JMicron 20360/20363 AHCI Controller much slower with 2.6.18 References: In-Reply-To: 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 Content-Length: 816 Lines: 28 Andrew Lyon wrote: > Hi, > > I have a Gigabyte GA_965P_DS3 with Core 2 Duo CPU, wd raptor connected > to onboard JMicron 20360/20363 AHCI Controller, with 2.6.18 the drive > is very slow: > > beast ~ # uname -a > Linux beast 2.6.18 #1 SMP Wed Sep 20 15:04:24 BST 2006 i686 Intel(R) > Core(TM)2 C > PU 6600 @ 2.40GHz GNU/Linux > beast ~ # hdparm -t /dev/sda > > /dev/sda: > Timing buffered disk reads: 100 MB in 3.02 seconds = 33.10 MB/sec Which IO scheduler are you using? If you're using anticipatory or cfq, can you try deadline? Thanks. -- tejun - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/