From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762026AbYCCR7Y (ORCPT ); Mon, 3 Mar 2008 12:59:24 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757049AbYCCR7L (ORCPT ); Mon, 3 Mar 2008 12:59:11 -0500 Received: from terminus.zytor.com ([198.137.202.10]:45997 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756843AbYCCR7K (ORCPT ); Mon, 3 Mar 2008 12:59:10 -0500 Message-ID: <47CC3C32.4000509@zytor.com> Date: Mon, 03 Mar 2008 09:58:10 -0800 From: "H. Peter Anvin" User-Agent: Thunderbird 2.0.0.9 (X11/20071115) MIME-Version: 1.0 To: Ingo Molnar CC: Nish Aravamudan , Arjan van de Ven , torvalds@linux-foundation.org, hans.rosenfeld@amd.com, linux-kernel@vger.kernel.org, Thomas Gleixner Subject: Re: bisected boot regression post 2.6.25-rc3.. please revert References: <20080301105646.2c8620d9@laptopd505.fenrus.org> <20080303074620.GC5934@elte.hu> <20080303091304.GA17911@elte.hu> <47CC2A3D.1000307@linux.intel.com> <20080303174009.GA19131@elte.hu> <29495f1d0803030951i151c6373oe1839705983795ee@mail.gmail.com> <20080303175557.GA26718@elte.hu> In-Reply-To: <20080303175557.GA26718@elte.hu> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Ingo Molnar wrote: > * Nish Aravamudan wrote: > >>> in any case, the commit has to be reverted as it clearly isnt a NOP >>> on your box as it was intended to be. (it should only have made a >>> difference in a rare hugetlbfs case) >> On x86/{,_64}, _PAGE_PSE and _PAGE_PROTNONE are the same bit. Would >> that have any effect here? We encountered that collision when adding >> mprotect() support for hugepages. > > well, this is the PMD, and PROTNONE is a pte property. The PSE bit in the PTE becomes the PATX bit. It shouldn't ever be set in Linux. -hpa