Re: [PATCH 09/12] cgroup: make sure parent won't be destroyed beforeits children

From: Tejun Heo
Date: Mon Apr 08 2013 - 11:36:46 EST


On Mon, Apr 08, 2013 at 02:35:02PM +0800, Li Zefan wrote:
> Suppose we rmdir a cgroup and there're still css refs, this cgroup won't
> be freed. Then we rmdir the parent cgroup, and the parent is freed
> immediately due to css ref draining to 0. Now it would be a disaster if
> the still-alive child cgroup tries to access its parent.
>
> Make sure this won't happen.
>
> Signed-off-by: Li Zefan <lizefan@xxxxxxxxxx>
> Reviewed-by: Michal Hocko <mhocko@xxxxxxx>
> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>

Acked-by: Tejun Heo <tj@xxxxxxxxxx>

Thanks.

--
tejun
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/