From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1161172AbXDXWEF (ORCPT ); Tue, 24 Apr 2007 18:04:05 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1161819AbXDXWEF (ORCPT ); Tue, 24 Apr 2007 18:04:05 -0400 Received: from cantor2.suse.de ([195.135.220.15]:55907 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1161172AbXDXWEE (ORCPT ); Tue, 24 Apr 2007 18:04:04 -0400 From: Andi Kleen Organization: SUSE Linux Products GmbH, Nuernberg, GF: Markus Rex, HRB 16746 (AG Nuernberg) To: David Miller Subject: Re: [Intel IOMMU][patch 8/8] Preserve some Virtual Address when devices cannot address entire range. Date: Wed, 25 Apr 2007 00:03:57 +0200 User-Agent: KMail/1.9.6 Cc: ashok.raj@intel.com, linux-kernel@vger.kernel.org, akpm@osdl.org, gregkh@suse.de, muli@il.ibm.com, asit.k.mallick@intel.com, suresh.b.siddha@intel.com, anil.s.keshavamurthy@intel.com, arjan@linux.intel.com, shaohua.li@intel.com References: <200704242312.54738.ak@suse.de> <20070424213835.GB31920@linux-os.sc.intel.com> <20070424.145026.128110905.davem@davemloft.net> In-Reply-To: <20070424.145026.128110905.davem@davemloft.net> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200704250003.57968.ak@suse.de> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Tuesday 24 April 2007 23:50:26 David Miller wrote: > From: Ashok Raj > Date: Tue, 24 Apr 2007 14:38:35 -0700 > > > Its not clear if we have a very generic device breakage.. most devices > > on these platforms are going to be more recent, (except maybe some > > legacy fd)... > > I'm not so sure, there are some "modern" sound cards that have > a 31-bit DMA addressing limitation because they use the 31st > bit as a status bit in their DMA descriptors :-) There's also a 2GB only megaraid RAID controller that's pretty popular because Dell shipped it for a long time. -Andi