From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757134AbZC1Ghh (ORCPT ); Sat, 28 Mar 2009 02:37:37 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753673AbZC1Gh1 (ORCPT ); Sat, 28 Mar 2009 02:37:27 -0400 Received: from ozlabs.org ([203.10.76.45]:58007 "EHLO ozlabs.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752870AbZC1Gh1 (ORCPT ); Sat, 28 Mar 2009 02:37:27 -0400 From: Rusty Russell To: Jeremy Fitzhardinge Subject: Re: [PATCH 3/5] lguest: avoid accidental recycling of pgdir pages Date: Sat, 28 Mar 2009 17:07:22 +1030 User-Agent: KMail/1.11.1 (Linux/2.6.27-11-generic; KDE/4.2.1; i686; ; ) Cc: lguest@ozlabs.org, Ingo Molnar , linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org References: <200903271022.28863.rusty@rustcorp.com.au> <200903271154.22450.rusty@rustcorp.com.au> <49CCFFC0.1020904@goop.org> In-Reply-To: <49CCFFC0.1020904@goop.org> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200903281707.22688.rusty@rustcorp.com.au> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Saturday 28 March 2009 03:03:04 Jeremy Fitzhardinge wrote: > Rusty Russell wrote: > > Now, I haven't *seen* this happen... > > > > Oh, maybe its because you already zap the shadows on tlb flush, and the > kernel is careful to tlb flush every pagetable page before freeing... OK, you've convinced me. I'll drop this patch. It was as I was looking for the inconsistent pte values that I thought of this issue. Thanks! Rusty.