From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755110AbZBEFo3 (ORCPT ); Thu, 5 Feb 2009 00:44:29 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752265AbZBEFoU (ORCPT ); Thu, 5 Feb 2009 00:44:20 -0500 Received: from terminus.zytor.com ([198.137.202.10]:52096 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751476AbZBEFoT (ORCPT ); Thu, 5 Feb 2009 00:44:19 -0500 Message-ID: <498A7BE3.40405@zytor.com> Date: Wed, 04 Feb 2009 21:40:51 -0800 From: "H. Peter Anvin" User-Agent: Thunderbird 2.0.0.14 (X11/20080501) MIME-Version: 1.0 To: Jeremy Fitzhardinge CC: Ingo Molnar , Linux Kernel Mailing List , Xen-devel Subject: Re: __supported_pte_mask breaks PROT_NONE pages References: <498A5002.9080408@goop.org> In-Reply-To: <498A5002.9080408@goop.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org [Dropped wli from the Cc: list because holomorphy.com doesn't resolve] Jeremy Fitzhardinge wrote: > > I guess the best fix is to only apply __supported_pte_mask to present > ptes. This seems like the right solution to me, as it means we can > completely ignore the issue of overlaps between the present pte bits and > the non-present pte-as-swap entry use of the bits. (Patch below.) > It certainly looks reasonable, so I have applied this patch to tip:x86/urgent. However, since I'm on the way out to FOSDEM I won't be able to run any tests on this. -hpa -- H. Peter Anvin, Intel Open Source Technology Center I work for Intel. I don't speak on their behalf.