From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756057AbZGFM0b (ORCPT ); Mon, 6 Jul 2009 08:26:31 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753094AbZGFM0X (ORCPT ); Mon, 6 Jul 2009 08:26:23 -0400 Received: from casper.infradead.org ([85.118.1.10]:43764 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753076AbZGFM0X (ORCPT ); Mon, 6 Jul 2009 08:26:23 -0400 Subject: Re: IOMMU and graphics cards From: David Woodhouse To: Joerg Roedel Cc: David Miller , airlied@linux.ie, linux-kernel@vger.kernel.org, fujita.tomonori@lab.ntt.co.jp, iommu@lists.linux-foundation.org, mingo@redhat.com, Zhenyu Wang In-Reply-To: <20090508093526.GB13708@8bytes.org> References: <20090507164742V.fujita.tomonori@lab.ntt.co.jp> <20090507100114.GF4059@amd.com> <1241691721.3531.73.camel@macbook.infradead.org> <20090507.113632.210373283.davem@davemloft.net> <20090508093526.GB13708@8bytes.org> Content-Type: text/plain Date: Mon, 06 Jul 2009 13:26:17 +0100 Message-Id: <1246883177.2615.33.camel@macbook.infradead.org> Mime-Version: 1.0 X-Mailer: Evolution 2.26.2 (2.26.2-1.fc11) Content-Transfer-Encoding: 7bit X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 2009-05-08 at 11:35 +0200, Joerg Roedel wrote: > The other way to achieve consistency is to remove the workaround from > VT-d code which significantly increases the chance to get the broken > stuff fixed. David? It's gone from 2.6.31-rc2, but even the in-tree drivers break, so I think we have to put it back for 2.6.31 (I've sent Linus the pull request already). I do intend to remove it again for 2.6.32 though, and I filed http://bugzilla.kernel.org/show_bug.cgi?id=13721 For now it's got a clearer description ("Workaround broken graphics drivers") and defaults to 'n'. -- David Woodhouse Open Source Technology Centre David.Woodhouse@intel.com Intel Corporation