From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760049AbZAJAYQ (ORCPT ); Fri, 9 Jan 2009 19:24:16 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753903AbZAJAYA (ORCPT ); Fri, 9 Jan 2009 19:24:00 -0500 Received: from smtp-out.google.com ([216.239.45.13]:49519 "EHLO smtp-out.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752813AbZAJAX7 (ORCPT ); Fri, 9 Jan 2009 19:23:59 -0500 DomainKey-Signature: a=rsa-sha1; s=beta; d=google.com; c=nofws; q=dns; h=mime-version:in-reply-to:references:date:message-id:subject:from:to: cc:content-type:content-transfer-encoding: x-gmailtapped-by:x-gmailtapped; b=ClB3fnqEjvy/oXEnqocbmGDzmy8G6DHPqlknnOYIatjP8ChbHfIcueNYJxAoPbIFM fUJHAuxgEqvXGp3vNOqZQ== MIME-Version: 1.0 In-Reply-To: <20090108182817.2c393351.kamezawa.hiroyu@jp.fujitsu.com> References: <20090108182556.621e3ee6.kamezawa.hiroyu@jp.fujitsu.com> <20090108182817.2c393351.kamezawa.hiroyu@jp.fujitsu.com> Date: Fri, 9 Jan 2009 16:23:53 -0800 Message-ID: <6599ad830901091623i2c3f6ce1ma88c845074b7c013@mail.gmail.com> Subject: Re: [RFC][PATCH 1/4] cgroup: support per cgroup subsys state ID (CSS ID) From: Paul Menage To: KAMEZAWA Hiroyuki Cc: "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" , "balbir@linux.vnet.ibm.com" , "nishimura@mxp.nes.nec.co.jp" , "lizf@cn.fujitsu.com" Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-GMailtapped-By: 172.28.16.148 X-GMailtapped: menage Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Jan 8, 2009 at 1:28 AM, KAMEZAWA Hiroyuki wrote: > + * > + * Looking up and scanning function should be called under rcu_read_lock(). > + * Taking cgroup_mutex()/hierarchy_mutex() is not necessary for all calls. Can you clarify here - do you mean "not necessary for any calls" (calls to what?) or "not necessary for some calls"? I presume the former. Paul