Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S266341AbUJIApA (ORCPT ); Fri, 8 Oct 2004 20:45:00 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S266344AbUJIApA (ORCPT ); Fri, 8 Oct 2004 20:45:00 -0400 Received: from spc2-brig1-3-0-cust232.asfd.broadband.ntl.com ([82.1.142.232]:23463 "EHLO ppgpenguin.kenmoffat.uklinux.net") by vger.kernel.org with ESMTP id S266341AbUJIAo6 convert rfc822-to-8bit (ORCPT ); Fri, 8 Oct 2004 20:44:58 -0400 Date: Sat, 9 Oct 2004 01:44:57 +0100 (BST) From: Ken Moffat To: Bartlomiej Zolnierkiewicz Cc: linux-kernel@vger.kernel.org Subject: Re: Problem with ide=nodma In-Reply-To: <58cb370e04100817353254b8cd@mail.gmail.com> Message-ID: References: <58cb370e04100817353254b8cd@mail.gmail.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=ISO-8859-15 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1468 Lines: 43 On Sat, 9 Oct 2004, Bartlomiej Zolnierkiewicz wrote: > On Sat, 9 Oct 2004 00:32:01 +0100 (BST), Ken Moffat > wrote: > > Hi, > > > > I'm trying a sii 0680 disk controller at the moment, as a possible > > workaround for some via southbridge problems (this is on a ppc which > > isn't yet supported by the official kernels, but it has been stable here > > since 2.6.7 and looks nearly ready for a first review). Unfortunately, > > DMA is a big no go at the moment so I have to pass ide=nodma in the > > bootargs. > > > > I've got the drives plugged into the sii card, and ide=reverse is doing > > its job. But although dmesg shows that dma has been turned off, > > Is it possible that you are reading it wrong? I don't think so, and the box is a lot more responsive. dmesg shows ide_setup: ide=nodmaIDE: Prevented DMA > > > /proc/ide/hda/settings and hdparm show that dma is in use. This is in > > 2.6.9-rc3. > > > > Doesn't ide=nodma work for off-board chipsets ? > > siimage host driver doesn't respect "ide=nodma". > You can hack siimage.c and comment out "hwif->autodma = 1". > Ok, thanks. I'll give that a try later. Ken -- das eine Mal als Trag?die, das andere Mal als Farce - 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/