From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1763827AbYEHPoq (ORCPT ); Thu, 8 May 2008 11:44:46 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754929AbYEHPoi (ORCPT ); Thu, 8 May 2008 11:44:38 -0400 Received: from e4.ny.us.ibm.com ([32.97.182.144]:55533 "EHLO e4.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754140AbYEHPog (ORCPT ); Thu, 8 May 2008 11:44:36 -0400 Date: Thu, 8 May 2008 08:44:31 -0700 From: Nishanth Aravamudan To: Dave Hansen Cc: Hans Rosenfeld , Hugh Dickins , Ingo Molnar , Jeff Chua , Thomas Gleixner , "H. Peter Anvin" , Gabriel C , Arjan van de Ven , linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH] x86: fix PAE pmd_bad bootup warning Message-ID: <20080508154431.GL23990@us.ibm.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> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1210258350.7905.45.camel@nimitz.home.sr71.net> X-Operating-System: Linux 2.6.25-mm1-00024-g164d446 (x86_64) User-Agent: Mutt/1.5.17+20080114 (2008-01-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 08.05.2008 [07:52:30 -0700], Dave Hansen wrote: > On Thu, 2008-05-08 at 16:34 +0200, Hans Rosenfeld wrote: > > While trying to reproduce this, I noticed that the huge page wouldn't > > leak when I just mmapped it and exited without explicitly unmapping, as > > I described before. The huge page is leaked only when the > > /proc/self/pagemap entry for the huge page is read. > > Well, that's an interesting data point! :) Indeed it is! Would explain why we've not seen any leaks until now. I will try to investigate, as well. Thanks, Nish -- Nishanth Aravamudan IBM Linux Technology Center From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from d01relay04.pok.ibm.com (d01relay04.pok.ibm.com [9.56.227.236]) by e2.ny.us.ibm.com (8.13.8/8.13.8) with ESMTP id m48FiYZb031222 for ; Thu, 8 May 2008 11:44:34 -0400 Received: from d01av04.pok.ibm.com (d01av04.pok.ibm.com [9.56.224.64]) by d01relay04.pok.ibm.com (8.13.8/8.13.8/NCO v8.7) with ESMTP id m48FiYal311590 for ; Thu, 8 May 2008 11:44:34 -0400 Received: from d01av04.pok.ibm.com (loopback [127.0.0.1]) by d01av04.pok.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id m48FiXXl026836 for ; Thu, 8 May 2008 11:44:34 -0400 Date: Thu, 8 May 2008 08:44:31 -0700 From: Nishanth Aravamudan Subject: Re: [PATCH] x86: fix PAE pmd_bad bootup warning Message-ID: <20080508154431.GL23990@us.ibm.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> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1210258350.7905.45.camel@nimitz.home.sr71.net> Sender: owner-linux-mm@kvack.org Return-Path: To: Dave Hansen Cc: Hans Rosenfeld , Hugh Dickins , Ingo Molnar , Jeff Chua , Thomas Gleixner , "H. Peter Anvin" , Gabriel C , Arjan van de Ven , linux-kernel@vger.kernel.org, linux-mm@kvack.org List-ID: On 08.05.2008 [07:52:30 -0700], Dave Hansen wrote: > On Thu, 2008-05-08 at 16:34 +0200, Hans Rosenfeld wrote: > > While trying to reproduce this, I noticed that the huge page wouldn't > > leak when I just mmapped it and exited without explicitly unmapping, as > > I described before. The huge page is leaked only when the > > /proc/self/pagemap entry for the huge page is read. > > Well, that's an interesting data point! :) Indeed it is! Would explain why we've not seen any leaks until now. I will try to investigate, as well. Thanks, Nish -- Nishanth Aravamudan IBM Linux Technology Center -- 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