From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1763843AbYEHQUp (ORCPT ); Thu, 8 May 2008 12:20:45 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752058AbYEHQUf (ORCPT ); Thu, 8 May 2008 12:20:35 -0400 Received: from outbound-sin.frontbridge.com ([207.46.51.80]:1058 "EHLO outbound2-sin-R.bigfish.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750852AbYEHQUd (ORCPT ); Thu, 8 May 2008 12:20:33 -0400 X-BigFish: VP X-MS-Exchange-Organization-Antispam-Report: OrigIP: 139.95.251.11;Service: EHS X-WSS-ID: 0K0K5DR-04-NER-01 Date: Thu, 8 May 2008 18:19:25 +0200 From: Hans Rosenfeld To: Dave Hansen Cc: Hugh Dickins , Ingo Molnar , Jeff Chua , Thomas Gleixner , "H. Peter Anvin" , Gabriel C , Arjan van de Ven , Nishanth Aravamudan , linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH] x86: fix PAE pmd_bad bootup warning Message-ID: <20080508161925.GH12654@escobedo.amd.com> References: <20080506124946.GA2146@elte.hu> <20080506202201.GB12654@escobedo.amd.com> <1210106579.4747.51.camel@nimitz.home.sr71.net> <20080508143453.GE12654@escobedo.amd.com> <1210258350.7905.45.camel@nimitz.home.sr71.net> <20080508151145.GG12654@escobedo.amd.com> <1210261882.7905.49.camel@nimitz.home.sr71.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1210261882.7905.49.camel@nimitz.home.sr71.net> User-Agent: Mutt/1.4.2.3i X-OriginalArrivalTime: 08 May 2008 16:19:24.0141 (UTC) FILETIME=[477F11D0:01C8B127] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, May 08, 2008 at 08:51:22AM -0700, Dave Hansen wrote: > Is there anything in your dmesg? mm/memory.c:127: bad pmd ffff810076801040(80000000720000e7). > There was a discussion on LKML in the last couple of days about > pmd_bad() triggering on huge pages. Perhaps we're clearing the mapping > with the pmd_none_or_clear_bad(), and *THAT* is leaking the page. That makes sense. I remember that explicitly munmapping the huge page would still work, but it doesn't. I don't quite remember what I did back then to test this, but I probably made some mistake there that led me to some false conclusions. -- %SYSTEM-F-ANARCHISM, The operating system has been overthrown From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Thu, 8 May 2008 18:19:25 +0200 From: Hans Rosenfeld Subject: Re: [PATCH] x86: fix PAE pmd_bad bootup warning Message-ID: <20080508161925.GH12654@escobedo.amd.com> References: <20080506124946.GA2146@elte.hu> <20080506202201.GB12654@escobedo.amd.com> <1210106579.4747.51.camel@nimitz.home.sr71.net> <20080508143453.GE12654@escobedo.amd.com> <1210258350.7905.45.camel@nimitz.home.sr71.net> <20080508151145.GG12654@escobedo.amd.com> <1210261882.7905.49.camel@nimitz.home.sr71.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1210261882.7905.49.camel@nimitz.home.sr71.net> Sender: owner-linux-mm@kvack.org Return-Path: To: Dave Hansen Cc: Hugh Dickins , Ingo Molnar , Jeff Chua , Thomas Gleixner , "H. Peter Anvin" , Gabriel C , Arjan van de Ven , Nishanth Aravamudan , linux-kernel@vger.kernel.org, linux-mm@kvack.org List-ID: On Thu, May 08, 2008 at 08:51:22AM -0700, Dave Hansen wrote: > Is there anything in your dmesg? mm/memory.c:127: bad pmd ffff810076801040(80000000720000e7). > There was a discussion on LKML in the last couple of days about > pmd_bad() triggering on huge pages. Perhaps we're clearing the mapping > with the pmd_none_or_clear_bad(), and *THAT* is leaking the page. That makes sense. I remember that explicitly munmapping the huge page would still work, but it doesn't. I don't quite remember what I did back then to test this, but I probably made some mistake there that led me to some false conclusions. -- %SYSTEM-F-ANARCHISM, The operating system has been overthrown -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org