From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262464AbTJ0Nn1 (ORCPT ); Mon, 27 Oct 2003 08:43:27 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262602AbTJ0Nn1 (ORCPT ); Mon, 27 Oct 2003 08:43:27 -0500 Received: from [212.55.154.22] ([212.55.154.22]:61347 "HELO sapo.pt") by vger.kernel.org with SMTP id S262464AbTJ0Nn0 (ORCPT ); Mon, 27 Oct 2003 08:43:26 -0500 Message-ID: <3F9D2111.3020109@vgertech.com> Date: Mon, 27 Oct 2003 13:43:45 +0000 From: Nuno Silva Organization: VGER, LDA User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.5) Gecko/20031020 Debian/1.5-1 X-Accept-Language: en-us, pt MIME-Version: 1.0 To: Shaun Savage CC: linux-kernel@vger.kernel.org Subject: Re: kernel 2.6t9 SATA slower than 2.4.20 References: <3F9D196C.9080301@savages.net> In-Reply-To: <3F9D196C.9080301@savages.net> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi! Shaun Savage wrote: > I have just compiled and installed kernel 2.6t9 on my RH9 / Asus A7N8X > Deluxe. I find the disk access is slower using the 2.6 kernel than the > 2.4.20 kernel. > > To get it to work for 2.4.20 kernel I have to use > # hdparm -d1 -X88 /dev/hde > then the buffered disk read goes from 1.5M to 55M > > On the 2.6 kernel the buffered disk read is only 16M > > What do I have to do to increase the disk speed for kernel 2.6t9? > I bet it's the "beat to death in lkml" issue with readahead. What's the output of cat /proc/ide/hdX? Regards, Nuno Silva > Shaun Savage >