From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262143AbTFFRIA (ORCPT ); Fri, 6 Jun 2003 13:08:00 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262144AbTFFRIA (ORCPT ); Fri, 6 Jun 2003 13:08:00 -0400 Received: from mail.ithnet.com ([217.64.64.8]:39441 "HELO heather.ithnet.com") by vger.kernel.org with SMTP id S262143AbTFFRH6 (ORCPT ); Fri, 6 Jun 2003 13:07:58 -0400 Date: Fri, 6 Jun 2003 19:21:20 +0200 From: Stephan von Krawczynski To: Ho Lee Cc: linux-kernel@vger.kernel.org Subject: Re: How to turn off ide dma ... Message-Id: <20030606192120.1b5185d9.skraw@ithnet.com> In-Reply-To: <9F77D654ED40B74CA79E5A60B97A087B07C313@sd-exchange.sdesigns.com> References: <9F77D654ED40B74CA79E5A60B97A087B07C313@sd-exchange.sdesigns.com> Organization: ith Kommunikationstechnik GmbH X-Mailer: Sylpheed version 0.9.2 (GTK+ 1.2.10; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 6 Jun 2003 10:22:52 -0700 Ho Lee wrote: > > ide=nodma option would help you. It disables DMA on every > IDE interfaces. Thanks, I know that. My problem is disabling DMA on _certain_ ide devices, while others remain with DMA enabled. How do you do that? Regards, Stephan > Regards, > Ho > > -----Original Message----- > From: Stephan von Krawczynski [mailto:skraw@ithnet.com] > Sent: Friday, June 06, 2003 5:25 AM > To: linux-kernel > Subject: How to turn off ide dma ... > > > for certain devices as boot-option in kernel 2.4.20 ? > > E.g. you have three devices and want one of them (not all) to come up PIO > instead of DMA. > As using hdparm gives errors and delays for about 20-30 seconds on this > device > it would be better to turn it off right from the beginning. > > Regards, > Stephan