From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755728AbZF0L5C (ORCPT ); Sat, 27 Jun 2009 07:57:02 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751312AbZF0L4w (ORCPT ); Sat, 27 Jun 2009 07:56:52 -0400 Received: from cmpxchg.org ([85.214.51.133]:59846 "EHLO cmpxchg.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751216AbZF0L4v (ORCPT ); Sat, 27 Jun 2009 07:56:51 -0400 Date: Sat, 27 Jun 2009 13:53:07 +0200 From: Johannes Weiner To: KOSAKI Motohiro Cc: Wu Fengguang , David Howells , Andrew Morton , LKML , Christoph Lameter , "peterz@infradead.org" , "riel@redhat.com" , "tytso@mit.edu" , "linux-mm@kvack.org" , "elladan@eskimo.com" , "npiggin@suse.de" , "minchan.kim@gmail.com" Subject: Re: [PATCH 0/3] make mapped executable pages the first class citizen Message-ID: <20090627115306.GA1741@cmpxchg.org> References: <7561.1245768237@redhat.com> <20090624023251.GA16483@localhost> <20090624114055.225D.A69D9226@jp.fujitsu.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20090624114055.225D.A69D9226@jp.fujitsu.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jun 24, 2009 at 11:43:21AM +0900, KOSAKI Motohiro wrote: > > On Tue, Jun 23, 2009 at 10:43:57PM +0800, David Howells wrote: > > > Wu Fengguang wrote: > > > > > > > David, could you try running this when it occurred again? > > > > > > > > make Documentation/vm/page-types > > > > Documentation/vm/page-types --raw # run as root > > > > > > Okay. I managed to catch it between the first and second OOMs, and ran the > > > command you asked for. > > > > Thank you! > > > > > 0x0000000000000000 142261 555 ________________________________ > > > 0x0000000000000400 6797 26 __________B_____________________ buddy > > > > The buddy+free numbers are pretty high. 26MB PG_buddy pages means much > > more actual free pages. So I bet the 555MB no-flag pages are mostly free pages. > > You mean our VM can make OOM although it have 600MB free pages? No, it has 600MB free pages after an OOM - which only means that the OOM killer did a good job ;-) From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail143.messagelabs.com (mail143.messagelabs.com [216.82.254.35]) by kanga.kvack.org (Postfix) with ESMTP id 6FA236B004D for ; Sat, 27 Jun 2009 07:55:21 -0400 (EDT) Date: Sat, 27 Jun 2009 13:53:07 +0200 From: Johannes Weiner Subject: Re: [PATCH 0/3] make mapped executable pages the first class citizen Message-ID: <20090627115306.GA1741@cmpxchg.org> References: <7561.1245768237@redhat.com> <20090624023251.GA16483@localhost> <20090624114055.225D.A69D9226@jp.fujitsu.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20090624114055.225D.A69D9226@jp.fujitsu.com> Sender: owner-linux-mm@kvack.org To: KOSAKI Motohiro Cc: Wu Fengguang , David Howells , Andrew Morton , LKML , Christoph Lameter , "peterz@infradead.org" , "riel@redhat.com" , "tytso@mit.edu" , "linux-mm@kvack.org" , "elladan@eskimo.com" , "npiggin@suse.de" , "minchan.kim@gmail.com" List-ID: On Wed, Jun 24, 2009 at 11:43:21AM +0900, KOSAKI Motohiro wrote: > > On Tue, Jun 23, 2009 at 10:43:57PM +0800, David Howells wrote: > > > Wu Fengguang wrote: > > > > > > > David, could you try running this when it occurred again? > > > > > > > > make Documentation/vm/page-types > > > > Documentation/vm/page-types --raw # run as root > > > > > > Okay. I managed to catch it between the first and second OOMs, and ran the > > > command you asked for. > > > > Thank you! > > > > > 0x0000000000000000 142261 555 ________________________________ > > > 0x0000000000000400 6797 26 __________B_____________________ buddy > > > > The buddy+free numbers are pretty high. 26MB PG_buddy pages means much > > more actual free pages. So I bet the 555MB no-flag pages are mostly free pages. > > You mean our VM can make OOM although it have 600MB free pages? No, it has 600MB free pages after an OOM - which only means that the OOM killer did a good job ;-) -- 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