Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755243AbYJ2VYq (ORCPT ); Wed, 29 Oct 2008 17:24:46 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754138AbYJ2VYh (ORCPT ); Wed, 29 Oct 2008 17:24:37 -0400 Received: from yx-out-2324.google.com ([74.125.44.29]:18916 "EHLO yx-out-2324.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754119AbYJ2VYg (ORCPT ); Wed, 29 Oct 2008 17:24:36 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:cc:in-reply-to:mime-version :content-type:content-transfer-encoding:content-disposition :references; b=jScycleztwsaMudRp6I+UrUsBFsYRkuI6fYu0T0KHeaoA6xYQeo8Gypk1iYAaxUaFj 0qpbuZBQutDqfAqC44gxCybwV3cwBB/yDdB7MTNrDAwxyQWa4iHdGILlhpQzqsXhOCzo t8BJISuiYCc69zARfOEX83bxnnuERxzClMk7c= Message-ID: <21d7e9970810291424g369035d4h562b54c676d49aef@mail.gmail.com> Date: Thu, 30 Oct 2008 07:24:34 +1000 From: "Dave Airlie" To: bob.montgomery@hp.com Subject: Re: [PATCH] disable CPU side GART accesses Cc: "Yinghai Lu" , "Ingo Molnar" , "linux-kernel@vger.kernel.org" , "vojtech@suse.cz" , "Linus Torvalds" , "chandru@in.ibm.com" , "Joerg Roedel" , "FUJITA Tomonori" , "Jesse Barnes" , "Pavel Machek" , "Andi Kleen" , "Dave Jones" In-Reply-To: <1225313564.3428.14.camel@amd.troyhebe> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <1224107317.2215.238.camel@amd.troyhebe> <20081015234842.GA10999@elte.hu> <1225147341.2215.401.camel@amd.troyhebe> <4906495B.1060506@kernel.org> <1225313564.3428.14.camel@amd.troyhebe> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1486 Lines: 38 On Thu, Oct 30, 2008 at 6:52 AM, Bob Montgomery wrote: > On Mon, 2008-10-27 at 23:06 +0000, Yinghai Lu wrote: >> Bob Montgomery wrote: >> > On Wed, 2008-10-15 at 23:48 +0000, Ingo Molnar wrote: >> >> (Cc:-ed the GART folks.) >> > >> > Are there any objections to this patch? The problem has been reproduced >> > in 2.6.18 and 2.6.27, so existing changes in the gart code have not >> > addressed it. >> >> better to have someone with amd system + 8g ram + agp adapter to verify it... >> >> YH > > Good idea. > > I don't think HP made a system with opteron and agp, so I haven't found > a system here to test. But I did see that there have been non-HP > motherboards from several years ago that advertised opteron with agp. > Anyone running that type of system? > > The other question is whether AGP graphics on linux for amd64 ever > expected host translation to work, since setting DisGartCpu is turning > off host translation. We have an option in the AGP drivers called cant_use_aperture. This stops the CPU from using the aperture for most DRI things. I can't confirm this won't regress working systems though. The whole AMD GART thing scares me, esp if some of the host chipsets also have an AGP GART. Dave. -- 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/