(2012/04/24 4:37), Glauber Costa wrote: > This will allow us to call destroy() without holding the > cgroup_mutex(). Other important updates inside update_flags() > are protected by the callback_mutex. > > We could protect this variable with the callback_mutex as well, > as suggested by Li Zefan, but we need to make sure we are protected > by that mutex at all times, and some of its updates happen inside the > cgroup_mutex - which means we would deadlock. > > An atomic variable is not expensive, since it is seldom updated, > and protect us well. > > Signed-off-by: Glauber Costa <glommer@xxxxxxxxxxxxx> Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe cgroups" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
