Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751261AbWIURii (ORCPT ); Thu, 21 Sep 2006 13:38:38 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751384AbWIURih (ORCPT ); Thu, 21 Sep 2006 13:38:37 -0400 Received: from brick.kernel.dk ([62.242.22.158]:7019 "EHLO kernel.dk") by vger.kernel.org with ESMTP id S1751261AbWIURih (ORCPT ); Thu, 21 Sep 2006 13:38:37 -0400 Date: Thu, 21 Sep 2006 19:43:11 +0200 From: Jens Axboe To: Tejun Heo Cc: Andrew Lyon , linux-kernel@vger.kernel.org Subject: Re: JMicron 20360/20363 AHCI Controller much slower with 2.6.18 Message-ID: <20060921174310.GK24362@kernel.dk> References: <4512C54B.9060705@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4512C54B.9060705@gmail.com> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 963 Lines: 31 On Fri, Sep 22 2006, Tejun Heo wrote: > 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? It would also be nice to have a way to turn NCQ off, btw, just to rule that out as well. -- Jens Axboe - 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/