Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757577AbYGNShf (ORCPT ); Mon, 14 Jul 2008 14:37:35 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756497AbYGNShK (ORCPT ); Mon, 14 Jul 2008 14:37:10 -0400 Received: from smtp-out03.alice-dsl.net ([88.44.63.5]:20121 "EHLO smtp-out03.alice-dsl.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756114AbYGNShJ (ORCPT ); Mon, 14 Jul 2008 14:37:09 -0400 To: Linus Torvalds Cc: Ingo Molnar , Linux Kernel Mailing List , Andrew Morton , Avi Kivity Subject: Re: [git pull] core, x86: make LIST_POISON less deadly From: Andi Kleen References: <20080714144828.GA22666@elte.hu> Date: Mon, 14 Jul 2008 20:35:05 +0200 In-Reply-To: (Linus Torvalds's message of "Mon, 14 Jul 2008 08:03:16 -0700 (PDT)") Message-ID: <871w1wz546.fsf@basil.nowhere.org> User-Agent: Gnus/5.1008 (Gnus v5.10.8) Emacs/21.3 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-OriginalArrivalTime: 14 Jul 2008 18:35:05.0424 (UTC) FILETIME=[55C18500:01C8E5E0] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 746 Lines: 17 Linus Torvalds writes: > > Why not pick something that is *guaranteed* to fault? The above looks like > any future setup that supports 41 bits of addressing and has extended the > page tables (yes, it will happen eventually) will find that to be a > perfectly valid address? When that happens then it will be either unmapped (and fault anyways) or the kernel has to be changed to 5 level page tables first and then surely the poison value could change too. -Andi -- 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/