Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750993AbWLMUQi (ORCPT ); Wed, 13 Dec 2006 15:16:38 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750962AbWLMUQh (ORCPT ); Wed, 13 Dec 2006 15:16:37 -0500 Received: from codepoet.org ([166.70.99.138]:44898 "EHLO codepoet.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750714AbWLMUQg (ORCPT ); Wed, 13 Dec 2006 15:16:36 -0500 X-Greylist: delayed 1410 seconds by postgrey-1.27 at vger.kernel.org; Wed, 13 Dec 2006 15:16:36 EST Date: Wed, 13 Dec 2006 12:53:05 -0700 From: Erik Andersen To: Karsten Weiss Cc: Christoph Anton Mitterer , linux-kernel@vger.kernel.org, Chris Wedgwood Subject: Re: data corruption with nvidia chipsets and IDE/SATA drives // memory hole mapping related bug?! Message-ID: <20061213195305.GA3358@codepoet.org> Reply-To: andersen@codepoet.org Mail-Followup-To: andersen@codepoet.org, Karsten Weiss , Christoph Anton Mitterer , linux-kernel@vger.kernel.org, Chris Wedgwood References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-No-Junk-Mail: I do not want to get *any* junk mail. User-Agent: Mutt/1.5.9i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1132 Lines: 27 On Mon Dec 11, 2006 at 10:24:02AM +0100, Karsten Weiss wrote: > Last week we did some more testing with the following result: > > We could not reproduce the data corruption anymore if we boot the machines > with the kernel parameter "iommu=soft" i.e. if we use software bounce > buffering instead of the hw-iommu. (As mentioned before, booting with > mem=2g works fine, too, because this disables the iommu altogether.) > > I.e. on these systems the data corruption only happens if the hw-iommu > (PCI-GART) of the Opteron CPUs is in use. > > Christoph, Erik, Chris: I would appreciate if you would test and hopefully > confirm this workaround, too. What did you set the BIOS to when testing this setting? Memory Hole enabled? IOMMU enabled? -Erik -- Erik B. Andersen http://codepoet-consulting.com/ --This message was written using 73% post-consumer electrons-- - 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/