From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Mon, 28 May 2001 16:14:50 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Mon, 28 May 2001 16:14:39 -0400 Received: from avocet.mail.pas.earthlink.net ([207.217.121.50]:57798 "EHLO avocet.mail.pas.earthlink.net") by vger.kernel.org with ESMTP id ; Mon, 28 May 2001 16:14:35 -0400 From: "Christopher B. Liebman" To: "Jens Axboe" , "Mark Hahn" Cc: "Acpi@Phobos. Fachschaften. Tu-Muenchen. De" , , , Subject: RE: [patch]: ide dma timeout retry in pio Date: Mon, 28 May 2001 16:13:15 -0400 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2911.0) In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4133.2400 Importance: Normal Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org I think that this may be an issue with ACPI processor power saving... I have documented issues with ide DMA timeouts when the processor is put into the C3 power state. One of the things that happens in this state is that buss master arbitration is *disabled*..... bus master activity is *supposed* to transition the system back to a C0 power state. I'll bet there are some issues with the Linux IDE dma and disabling bus master arbitration...... ideas? thoughts? patches? ;-) -- Chris > -----Original Message----- > From: linux-kernel-owner@vger.kernel.org > [mailto:linux-kernel-owner@vger.kernel.org]On Behalf Of Mark Hahn > > I seem to recall Andre saying that the problem arises when the > ide DMA engine looses PCI arbitration during a burst. shorter > bursts would seem like the best workaround if this is the problem... >