Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751308Ab3FWT3n (ORCPT ); Sun, 23 Jun 2013 15:29:43 -0400 Received: from out1-smtp.messagingengine.com ([66.111.4.25]:54798 "EHLO out1-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750849Ab3FWT3k (ORCPT ); Sun, 23 Jun 2013 15:29:40 -0400 X-Sasl-enc: AnvHA0QBxybdyCtfWQ9qRthateVmu5+P6VCADQooVrA2 1372015779 Date: Sun, 23 Jun 2013 16:29:36 -0300 From: Henrique de Moraes Holschuh To: "H. Peter Anvin" Cc: Brice Goglin , Linux Kernel Mailing List , David Airlie , dri-devel@lists.freedesktop.org Subject: Re: MTRR use in drivers Message-ID: <20130623192936.GA28655@khazad-dum.debian.net> References: <51C3DDFA.7050204@zytor.com> <51C69732.1010906@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-GPG-Fingerprint: 1024D/1CDB0FE3 5422 5C61 F6B7 06FB 7E04 3738 EE25 DE3F 1CDB 0FE3 User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 842 Lines: 20 On Sun, 23 Jun 2013, H. Peter Anvin wrote: > Why do you care about performance when PAT is disabled? It will regress already slow boxes. We blacklist a LOT of P4s, PMs, etc and nobody ever took the pain to track down which ones of those actually have PAT+MTRR aliasing bugs. These boxes have boards like the Radeon X300, which needs either PAT or MTRR to not become unusable... -- "One disk to rule them all, One disk to find them. One disk to bring them all and in the darkness grind them. In the Land of Redmond where the shadows lie." -- The Silicon Valley Tarot Henrique Holschuh -- 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/