From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932875Ab3DOD5e (ORCPT ); Sun, 14 Apr 2013 23:57:34 -0400 Received: from mail-pb0-f54.google.com ([209.85.160.54]:49813 "EHLO mail-pb0-f54.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752839Ab3DOD5d (ORCPT ); Sun, 14 Apr 2013 23:57:33 -0400 Date: Sun, 14 Apr 2013 20:57:20 -0700 From: Tejun Heo To: Li Zefan Cc: containers@lists.linux-foundation.org, cgroups@vger.kernel.org, linux-kernel@vger.kernel.org, kay@vrfy.org, greg@kroah.com, lennart@poettering.net, daniel@zonque.org Subject: Re: [PATCH 4/4] cgroup: implement task_cgroup_path_from_hierarchy() Message-ID: <20130415035720.GN3050@htj.dyndns.org> References: <1365964619-14762-1-git-send-email-tj@kernel.org> <1365964619-14762-5-git-send-email-tj@kernel.org> <516B7753.9060503@huawei.com> <20130415034613.GK3050@htj.dyndns.org> <516B78E5.6000109@huawei.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <516B78E5.6000109@huawei.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hey, Li. On Mon, Apr 15, 2013 at 11:49:57AM +0800, Li Zefan wrote: > But if id is invalid, idr_find() will return NULL. As long as root is not NULL, > task_cgroup_from_root() will always return a valid cgroup. I'm hopping across multiple devel branches quickly today and somewhat tipsy. Sorry about the blabber. :) -- tejun