Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261517AbVCRJDX (ORCPT ); Fri, 18 Mar 2005 04:03:23 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261512AbVCRJDX (ORCPT ); Fri, 18 Mar 2005 04:03:23 -0500 Received: from mta2.cl.cam.ac.uk ([128.232.0.14]:44438 "EHLO mta2.cl.cam.ac.uk") by vger.kernel.org with ESMTP id S261517AbVCRJCg (ORCPT ); Fri, 18 Mar 2005 04:02:36 -0500 In-Reply-To: <16954.7656.838769.483631@cargo.ozlabs.ibm.com> References: <16952.41973.751326.592933@cargo.ozlabs.ibm.com> <200503161406.01788.jbarnes@engr.sgi.com> <29ab1884ee5724e9efcfe43f14d13376@cl.cam.ac.uk> <16953.20279.77584.501222@cargo.ozlabs.ibm.com> <1111067594.1213.27.camel@localhost.localdomain> <16954.7656.838769.483631@cargo.ozlabs.ibm.com> Mime-Version: 1.0 (Apple Message framework v619.2) Content-Type: text/plain; charset=US-ASCII; format=flowed Message-Id: <03425ef53cbc0ed3d82b5a127f892180@cl.cam.ac.uk> Content-Transfer-Encoding: 7bit Cc: Jesse Barnes , akpm@osdl.org, Ian.Pratt@cl.cam.ac.uk, riel@redhat.com, Alan Cox , kurt@garloff.de, Linux Kernel Mailing List , Christian.Limpach@cl.cam.ac.uk From: Keir Fraser Subject: Re: [PATCH] Xen/i386 cleanups - AGP bus/phys cleanups Date: Fri, 18 Mar 2005 09:05:06 +0000 To: Paul Mackerras X-Mailer: Apple Mail (2.619.2) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 898 Lines: 22 On 18 Mar 2005, at 00:16, Paul Mackerras wrote: > That sounds like a good way to make AGP accesses slower. :) > > Seriously, given that AGP is a technology that is being superseded by > PCI Express, I think it's reasonable to look at the range of current > implementations to see what we have to cope with. So I don't think > it's worth worrying too much about the possibility of GARTs that go > through the IOMMU. However, the idea of having phys_to_agp/agp_to_phys > (or virt_to_agp/agp_to_virt) sounds like it wouldn't be too much > effort, if it would help Xen. I'll post a patch for this next week. Thanks for your patience so far! -- Keir - 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/