[lxc-devel] [PATCH 7/8] cgroup: mount cgroupns-root when inside non-init cgroupns
Tejun Heo
tj at kernel.org
Tue Dec 1 16:46:49 UTC 2015
Hey, Serge.
On Mon, Nov 30, 2015 at 10:07:04PM -0600, Serge E. Hallyn wrote:
> So actually the way the code is now, the first mount cannot
> be done from a non-init user namespace; and kernfs_obtain_root()
> is only called from non-init user namespace. So can we assume
> that the root dentry will be instantiated? (or can it get
> evicted?)
>
> If we can assume that then most of that fn can go away.
The v2 hierarchy is always mounted and non-init ns shouldn't be able
to create new v1 hierarchies, so the root dentry should always be
there.
Thanks.
--
tejun
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