From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756877AbZJVVsD (ORCPT ); Thu, 22 Oct 2009 17:48:03 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756528AbZJVVsC (ORCPT ); Thu, 22 Oct 2009 17:48:02 -0400 Received: from mga02.intel.com ([134.134.136.20]:65215 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756365AbZJVVsB (ORCPT ); Thu, 22 Oct 2009 17:48:01 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.44,608,1249282800"; d="scan'208";a="460363713" Subject: Re: [RFC Patch] use MTRR for write combining if PAT is not available From: Suresh Siddha Reply-To: Suresh Siddha To: Eric Anholt Cc: Thomas Schlichter , Ingo Molnar , Jan Beulich , Jeremy Fitzhardinge , Robert Hancock , Henrique de Moraes Holschuh , "Pallipadi, Venkatesh" , Tejun Heo , "x86@kernel.org" , Yinghai Lu , Thomas Gleixner , Arjan van de Ven , "dri-devel@lists.sourceforge.net" , Ingo Molnar , "linux-kernel@vger.kernel.org" , "jbarnes@virtuousgeek.org" , Thomas Hellstrom , "H. Peter Anvin" In-Reply-To: <1256225689.32075.6.camel@gaiman.anholt.net> References: <1394846127@web.de> <4ADF32A0020000780001B20A@vpn.id2.novell.com> <20091021173514.GA32227@elte.hu> <200910212201.36578.thomas.schlichter@web.de> <1256205210.2530.28.camel@sbs-t61> <1256225689.32075.6.camel@gaiman.anholt.net> Content-Type: text/plain Organization: Intel Corp Date: Thu, 22 Oct 2009 14:47:30 -0700 Message-Id: <1256248050.2546.9.camel@sbs-t61> Mime-Version: 1.0 X-Mailer: Evolution 2.26.3 (2.26.3-1.fc11) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 2009-10-22 at 08:34 -0700, Eric Anholt wrote: > Can we just not create the _wc sysfs entry if we don't have PAT? I > don't think there's userland relying on its presence as opposed to the > non-_wc entry. Yes indeed. Jesse do you see an issue with this? This is simple and clean. Thanks Eric.