On Wed, Apr 16, 2008 at 10:16 PM, Andrew Morton
<akpm@linux-foundation.org> wrote:
>  > > Maybe it would be better to not do a cgroup_exit() until we're
>  > > unhashed, so that cgroup_enable_task_cg_list() can't find the exiting
>  > > task?
>
>  So we won't be doing what Paul suggested?
>

It's not as high a priority as Li's bug fix (which may be a good
candidate for 2.6.25.1) but for the future I think I'll implement this
distinguished css_set pointer for tasks that have finished
cgroup_exit(), since I think it will make the similar synchronization
in attach_task() cleaner, as well as cgroup_enable_task_cg_list().

Paul
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