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, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>