This patchset converts memcg to use cgroup->id, and then we can remove cgroup css_id. As we've removed memcg's own refcnt, converting memcg to use cgroup->id is very straight-forward. The patchset is based on Tejun's cgroup tree. Li Zefan (8): cgroup: convert cgroup_ida to cgroup_idr cgroup: document how cgroup IDs are assigned cgroup: implement cgroup_from_id() memcg: convert to use cgroup_is_descendant() memcg: convert to use cgroup id memcg: fail to create cgroup if the cgroup id is too big memcg: stop using css id cgroup: kill css_id -- include/linux/cgroup.h | 49 ++------- kernel/cgroup.c | 308 ++++++++----------------------------------------------- mm/memcontrol.c | 59 ++++++----- 3 files changed, 90 insertions(+), 326 deletions(-) -- 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