From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261689AbVGFFUZ (ORCPT ); Wed, 6 Jul 2005 01:20:25 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262087AbVGFFUY (ORCPT ); Wed, 6 Jul 2005 01:20:24 -0400 Received: from [213.184.187.37] ([213.184.187.37]:42756 "EHLO raad.intranet") by vger.kernel.org with ESMTP id S261689AbVGFD2W (ORCPT ); Tue, 5 Jul 2005 23:28:22 -0400 Message-Id: <200507060326.GAA25248@raad.intranet> From: "Al Boldi" To: "'Linus Torvalds'" , "'Grant Coady'" Cc: "'Jens Axboe'" , "'Ondrej Zary'" , "=?windows-1256?Q?'Andr=E9_Tomt'?=" , "'Bartlomiej Zolnierkiewicz'" , , Subject: RE: [git patches] IDE update Date: Wed, 6 Jul 2005 06:26:03 +0300 MIME-Version: 1.0 Content-Type: text/plain; charset="windows-1256" Content-Transfer-Encoding: 7bit X-Mailer: Microsoft Office Outlook, Build 11.0.5510 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 In-Reply-To: Thread-Index: AcWBxGnjRVIkuePeQnCOyjecro3VlgAFRGIg Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Linus Torvalds wrote: { On Wed, 6 Jul 2005, Grant Coady wrote: > > Executive Summary Btw, can you try this same thing (or at least a subset) with a large file on a filesystem? Does that show the same pattern, or is it always just the raw device? } Linus, Cat /dev/hda > /dev/null and cat /tmp/tst.dsk > /dev/null show the same symptoms. The problem shows most when the cpu is slow and the hd is fast. When the cpu is fast and the hd is slow the cpu will make up for lost cycles and the problem will not show!