On 01/10/2018 06:44 PM, Tejun Heo wrote: > On Wed, Jan 10, 2018 at 06:02:39AM -0800, Tejun Heo wrote: >> Hello, >> >> On Wed, Jan 10, 2018 at 04:44:14AM -0800, Roman Gushchin wrote: >>> cgroup.threads is not listed because it's not delegatable (doesn't have >>> CFTYPE_NS_DELEGATABLE flag set). I don't know if it was intended or just >>> an accident (I believe the latter). >> >> So, thread mode isn't delegatble. Marking a cgroup as threaded turns >> that subtree threaded and join the parent's domain, so we can't allow >> delegation roots to be turned threaded - just like we can't mark the >> root cgroup threaded, and I'm not really not sure what it means to >> delegate a portion of threaded subtree. > > Please disregard. > > Just like we can't mark the root cgroup threaded, we can't mark > delegated subtree root's threaded, so cgroup.type is not delegatable. > > However, the delegated root's children can definitely be marked > threadaed and they will join the delegated root's domain and the > threads are free to move between root and the threaded subtree. Exactly, so cgroup.threads in the threaded root must be made writable by the delegatee. Thanks, Tejun. Cheers, Michael -- Michael Kerrisk Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ Linux/UNIX System Programming Training: http://man7.org/training/ -- 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
