From mboxrd@z Thu Jan  1 00:00:00 1970
From: Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Subject: Re: [PATCH 7/8] cgroup: mount cgroupns-root when inside non-init
 cgroupns
Date: Wed, 2 Dec 2015 11:53:12 -0500
Message-ID: <20151202165312.GB19878@mtj.duckdns.org>
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To: "Serge E. Hallyn" <serge.hallyn-GeWIH/nMZzLQT0dZR+AlfA@public.gmane.org>
Cc: serge-A9i7LUbDfNHQT0dZR+AlfA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, adityakali-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org, linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, containers-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, lxc-devel-cunTk1MwBs9qMoObBWhMNEqPaTDuhLve2LY78lusg7I@public.gmane.org, akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org, ebiederm-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org

Hello, Serge.

On Tue, Dec 01, 2015 at 03:58:53PM -0600, Serge E. Hallyn wrote:
> I mispoke before though - it's not the hierarchy's root dentry,
> but rather a dentry for a descendent cgroup which will become the
> root dentry for the new superblock.  We do know that there must be
> a css_set with a cgroup.  I'm still trying to track down whether
> that cgrou's inode's dentry can ever be flushed.  I would think
> not but am not sure.

Hmmm... I'm not really following.  The inode can be flushed and that's
why it needs to be walked down from root.  What am I missing here?

Thanks.

-- 
tejun