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SubjectRe: [PATCH] cgroup: fix dentry still in use bug when dropping css refs after umount
Hello, Li.

On Wed, Jul 04, 2012 at 02:19:15PM +0800, Li Zefan wrote:
> > I think we're horridly broken for
> > root cgroup tho - and it has been broken for very long time. I think
> > it's mostly hidden because most (all?) controllers short-circuit root
> > cgroup. Eh, well....
> >
> Could you elaborate a bit on what's broken for root cgroup?

If someone holds css ref of a root cgroup, AFAICS nothing is
preventing the cgroup hierarchy from being unmounted and root cgroup



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