On Tue, Aug 13, 2013 at 09:17:53AM +0800, Li Zefan wrote: > Now cgroup core gets a reference to the css when a cgroup file is > opened(), and the reference is dropped at file release. so it's > guaranteed the cpuset is online during the write function. Hmmm... it doesn't really guarantee that as css's can be offlined with residual css refcnts, os the css may well be offlined by the time it reaches the rw functions. What's guaranteed is that their refcnts wouldn't be zero. Eventually we need to implement proper sever semantics (probably by replacing the custom fs implementation with sysfs) but right now controllers still need to deal with offline css's. Thanks. -- tejun -- 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
