Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754559AbZFXCna (ORCPT ); Tue, 23 Jun 2009 22:43:30 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751844AbZFXCnW (ORCPT ); Tue, 23 Jun 2009 22:43:22 -0400 Received: from fgwmail7.fujitsu.co.jp ([192.51.44.37]:54691 "EHLO fgwmail7.fujitsu.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751611AbZFXCnV (ORCPT ); Tue, 23 Jun 2009 22:43:21 -0400 From: KOSAKI Motohiro To: Wu Fengguang Subject: Re: [PATCH 0/3] make mapped executable pages the first class citizen Cc: kosaki.motohiro@jp.fujitsu.com, David Howells , Andrew Morton , LKML , Christoph Lameter , "hannes@cmpxchg.org" , "peterz@infradead.org" , "riel@redhat.com" , "tytso@mit.edu" , "linux-mm@kvack.org" , "elladan@eskimo.com" , "npiggin@suse.de" , "minchan.kim@gmail.com" In-Reply-To: <20090624023251.GA16483@localhost> References: <7561.1245768237@redhat.com> <20090624023251.GA16483@localhost> Message-Id: <20090624114055.225D.A69D9226@jp.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-Mailer: Becky! ver. 2.50.07 [ja] Date: Wed, 24 Jun 2009 11:43:21 +0900 (JST) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1063 Lines: 28 > 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? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/