(2012/11/27 3:47), Michal Hocko wrote: > css reference counting keeps the cgroup alive even though it has been > already removed. mem_cgroup_iter relies on this fact and takes a > reference to the returned group. The reference is then released on the > next iteration or mem_cgroup_iter_break. > mem_cgroup_iter currently releases the reference right after it gets the > last css_id. > This is correct because neither prev's memcg nor cgroup are accessed > after then. This will change in the next patch so we need to hold the > group alive a bit longer so let's move the css_put at the end of the > function. > > Signed-off-by: Michal Hocko <mhocko@xxxxxxx> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> -- 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>