Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754666Ab0DWDsO (ORCPT ); Thu, 22 Apr 2010 23:48:14 -0400 Received: from cn.fujitsu.com ([222.73.24.84]:50218 "EHLO song.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1753108Ab0DWDsM (ORCPT ); Thu, 22 Apr 2010 23:48:12 -0400 Message-ID: <4BD118E2.7080307@cn.fujitsu.com> Date: Fri, 23 Apr 2010 11:49:54 +0800 From: Li Zefan User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1b3pre) Gecko/20090513 Fedora/3.0-2.3.beta2.fc11 Thunderbird/3.0b2 MIME-Version: 1.0 To: KAMEZAWA Hiroyuki CC: Balbir Singh , Daisuke Nishimura , "Paul E. McKenney" , "linux-mm@kvack.org" , LKML , "akpm@linux-foundation.org" Subject: Re: [BUGFIX][PATCH] memcg rcu lock fix in swap code (Was Re: [BUG] an RCU warning in memcg References: <4BD10D59.9090504@cn.fujitsu.com> <20100423121424.ae47efcb.kamezawa.hiroyu@jp.fujitsu.com> In-Reply-To: <20100423121424.ae47efcb.kamezawa.hiroyu@jp.fujitsu.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 650 Lines: 22 KAMEZAWA Hiroyuki wrote: > On Fri, 23 Apr 2010 11:00:41 +0800 > Li Zefan wrote: > >> with CONFIG_PROVE_RCU=y, I saw this warning, it's because >> css_id() is not under rcu_read_lock(). >> > > Ok. Thank you for reporting. > This is ok ? Yes, and I did some more simple tests on memcg, no more warning showed up. > == > From: KAMEZAWA Hiroyuki > -- 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/