Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758172AbXITRK0 (ORCPT ); Thu, 20 Sep 2007 13:10:26 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752245AbXITRKR (ORCPT ); Thu, 20 Sep 2007 13:10:17 -0400 Received: from outbound-mail-13.bluehost.com ([69.89.18.113]:57692 "HELO outbound-mail-13.bluehost.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1751459AbXITRKP (ORCPT ); Thu, 20 Sep 2007 13:10:15 -0400 From: Jesse Barnes To: Andi Kleen Subject: Re: MTRR initialization Date: Thu, 20 Sep 2007 10:08:53 -0700 User-Agent: KMail/1.9.7 Cc: Jesse Barnes , Howard Chu , linux-kernel References: <46EAB7DA.10507@symas.com> <200709200803.31795.jbarnes@virtuousgeek.org> In-Reply-To: <200709200803.31795.jbarnes@virtuousgeek.org> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200709201008.53728.jbarnes@virtuousgeek.org> X-Identified-User: {642:box128.bluehost.com:virtuous:virtuousgeek.org} {sentby:smtp auth 209.164.175.194 authed with jbarnes@virtuousgeek.org} X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - box128.bluehost.com X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [642 12] / [47 12] X-AntiAbuse: Sender Address Domain - virtuousgeek.org Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 979 Lines: 19 On Thursday, September 20, 2007, Jesse Barnes wrote: > On Wednesday, September 19, 2007 11:50:23 pm Andi Kleen wrote: > > Jesse Barnes writes: > > > To do this in a nicer way (and be less vulnerable to similar BIOS > > > funkiness) the kernel really needs full PAT support. That should > > > allow WC over WB and WC over UC mappings to occur, at least if > > > I'm remembering the docs right... > > > > PAT only really helps for device driver performance optimizations. > > But if the basic WB MTRRs are wrong PAT cannot really salvage it. > > Look at the original bug report. There's a bug WB region so any ^^^ err big - 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/