Re: [PATCH 1/2] cgroups: cleanup for dummy root

[Li Zefan]

Li Zefan wrote:
> - Don't link rootnode to the root list, so root_list contains active
>   hierarchies only as the comment indicates.
> 
> - Don't link css_sets to the dummy cgroup, because we never want to
>   run through the tasks in that dummpy cgroup (which means run
>   through all the tasks in the system).
> 
> Signed-off-by: Li Zefan <lizf@xxxxxxxxxxxxxx>

Hmmm...Sorry, this patch is wrong, when a subsystem is inactive thus in
rootnode, it may still iterate tasks in dummy top cgroup, though currently
no subsystem does so.

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