On Wed, Dec 02, 2015 at 10:56:37AM -0600, Serge E. Hallyn wrote:

Can it be flushed when we know that the cgroup is being pinned by
a css_set?  (There's either a task or a cgroup_namespace pinning it
or we wouldn't get here)

Yeap, it can be flushed.  There's no ref coming out of cgroup to the
vfs objects.

Thanks.

-- 
tejun