Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1422959AbXBHMdY (ORCPT ); Thu, 8 Feb 2007 07:33:24 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1422964AbXBHMdY (ORCPT ); Thu, 8 Feb 2007 07:33:24 -0500 Received: from vsmtp21.tin.it ([212.216.176.109]:33546 "EHLO vsmtp21.tin.it" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1422959AbXBHMdX (ORCPT ); Thu, 8 Feb 2007 07:33:23 -0500 Date: Thu, 8 Feb 2007 13:33:16 +0100 (CET) From: l.genoni@oltrelinux.com X-X-Sender: venom@Phoenix.oltrelinux.com To: Robert Hancock cc: Alan , linux-kernel , Luigi Genoni , l.genoni@sns.it Subject: Re: [BUG?] ata disk running maximum at DMA33 with 2.6.20 and new pata driver, NV CK804 ide controller. In-Reply-To: <45CAA8EA.2010505@shaw.ca> Message-ID: References: <45CAA8EA.2010505@shaw.ca> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2091 Lines: 53 Well, the cable is OK, of course I checked. On Wed, 7 Feb 2007, Robert Hancock wrote: > Date: Wed, 07 Feb 2007 22:36:58 -0600 > From: Robert Hancock > To: Alan , > linux-kernel > Cc: Luigi Genoni > Subject: Re: [BUG?] ata disk running maximum at DMA33 with 2.6.20 and new pata > driver, NV CK804 ide controller. > Resent-Date: Thu, 08 Feb 2007 05:47:22 +0100 > Resent-From: > > Alan wrote: >> On Wed, 7 Feb 2007 01:19:36 +0100 >> Luigi Genoni wrote: >> >>> Hi, >>> since upgrading to kernel 2.6.20 my pata disk, using new pata driver, is >>> initialized maximum in DMA33 mode (and obviously performances drop >>> consequently), as you can see from: >> >> Interesting. >> >>> Willing to test any patch. >> >> Firstly can you see if its consistently the case that booting 2.6.20 >> gives UDMA33 and 2.6.19 UDMA100 over a few reboots. If it is please drop >> the 2.6.19 drivers/ata/pamd_amd into 2.6.20 and try that. > > As an aside to this sort of problem, shouldn't we print some kind of loud > message in dmesg when we force a high-UDMA-capable device down to UDMA33 due > to a 40-wire cable detection? In the case where it truly is a 40-wire cable > the user may want to know that and replace the cable, if it isn't it gives > more of a hint of why the drive isn't running at full speed.. > > -- > Robert Hancock Saskatoon, SK, Canada > To email, remove "nospam" from hancockr@nospamshaw.ca > Home Page: http://www.roberthancock.com/ > > - > 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/ > - 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/