From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932174AbXGNBSV (ORCPT ); Fri, 13 Jul 2007 21:18:21 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1760854AbXGNBSP (ORCPT ); Fri, 13 Jul 2007 21:18:15 -0400 Received: from tomts16.bellnexxia.net ([209.226.175.4]:51617 "EHLO tomts16-srv.bellnexxia.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760283AbXGNBSP (ORCPT ); Fri, 13 Jul 2007 21:18:15 -0400 Date: Fri, 13 Jul 2007 21:18:13 -0400 From: Mathieu Desnoyers To: Andrew Morton Cc: linux-kernel@vger.kernel.org, Andi Kleen Subject: [PATCH] i386 CPA fix - do not free reserved pages Message-ID: <20070714011813.GA31649@Krystal> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Content-Disposition: inline X-Editor: vi X-Info: http://krystal.dyndns.org:8080 X-Operating-System: Linux/2.6.21.3-grsec (i686) X-Uptime: 21:16:35 up 6 days, 15:21, 2 users, load average: 0.18, 0.17, 0.18 User-Agent: Mutt/1.5.13 (2006-08-11) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org i386 CPA fix - do not free reserved pages We have to use the same conditions found in change_page_attr in global_tlb_flush regarding the conditions that leads to free the page. It applies to 2.6.22-rc6-mm1 (as it been applied for the next one ?) Signed-off-by: Mathieu Desnoyers CC: Andi Kleen --- arch/i386/mm/pageattr.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) Index: linux-2.6-lttng/arch/i386/mm/pageattr.c =================================================================== --- linux-2.6-lttng.orig/arch/i386/mm/pageattr.c 2007-07-03 13:25:48.000000000 -0400 +++ linux-2.6-lttng/arch/i386/mm/pageattr.c 2007-07-03 13:28:34.000000000 -0400 @@ -247,7 +247,7 @@ list_for_each_entry_safe(pg, next, &l, lru) { clear_bit(PG_arch_1, &pg->flags); list_del(&pg->lru); - if (page_private(pg) != 0) + if (PageReserved(pg) || !cpu_has_pse || page_private(pg) != 0) continue; ClearPagePrivate(pg); __free_page(pg); -- Mathieu Desnoyers Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68