From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755061AbYDRFID (ORCPT ); Fri, 18 Apr 2008 01:08:03 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750765AbYDRFHy (ORCPT ); Fri, 18 Apr 2008 01:07:54 -0400 Received: from fgwmail7.fujitsu.co.jp ([192.51.44.37]:42707 "EHLO fgwmail7.fujitsu.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750782AbYDRFHw (ORCPT ); Fri, 18 Apr 2008 01:07:52 -0400 Date: Fri, 18 Apr 2008 14:09:46 +0900 From: KAMEZAWA Hiroyuki To: KAMEZAWA Hiroyuki Cc: Andrew Morton , Shi Weihua , balbir@linux.vnet.ibm.com, xemul@openvz.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, hugh@veritas.com Subject: Re: [PATCH] memcgroup: check and initialize page->cgroup in memmap_init_zone Message-Id: <20080418140946.e265c1f3.kamezawa.hiroyu@jp.fujitsu.com> In-Reply-To: <20080418123256.da4d1db0.kamezawa.hiroyu@jp.fujitsu.com> References: <48080706.50305@cn.fujitsu.com> <48080930.5090905@cn.fujitsu.com> <48080B86.7040200@cn.fujitsu.com> <20080417201432.36b1c326.akpm@linux-foundation.org> <20080418123256.da4d1db0.kamezawa.hiroyu@jp.fujitsu.com> Organization: Fujitsu X-Mailer: Sylpheed 2.4.2 (GTK+ 2.10.11; i686-pc-mingw32) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 18 Apr 2008 12:32:56 +0900 KAMEZAWA Hiroyuki wrote: > > Or perhaps that page was used and then later freed before we got to > > memmap_init_zone() and was freed with a non-zero ->page_cgroup. Which is > > unlikely given that page.page_cgroup was only just added and is only > > present if CONFIG_CGROUP_MEM_RES_CTLR. > > > Hmm, I'll try his .config and see what happens. > I reproduced the hang with his config and confirmed his fix works well. But I can't find why...I'll dig a bit more. Thanks, -Kame