From mboxrd@z Thu Jan  1 00:00:00 1970
From: Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Subject: Re: [PATCH 4/4] cgroup: implement task_cgroup_path_from_hierarchy()
Date: Sun, 14 Apr 2013 20:57:20 -0700
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To: Li Zefan <lizefan-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
Cc: containers-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, kay-tD+1rO4QERM@public.gmane.org, greg-U8xfFu+wG4EAvxtiuMwx3w@public.gmane.org, lennart-mdGvqq1h2p+GdvJs77BJ7Q@public.gmane.org, daniel-cYrQPVfZoowdnm+yROfE0A@public.gmane.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