This is a v2 patch for preventing failure in memcg->pre_destroy(). With this patch, ->pre_destroy() will never return error code and users will not see warning at rmdir(). And this work will simplify memcg->pre_destroy(), largely. This patch is based on linux-next + hugetlb memory control patches. I post this as RFC because I'll have vacation in the next week and hugetlb patches are not visible in linux-next yet. So, I'm not in hurry. Please review when you have time. I'll rebase this onto memcg-devel in the next post. == BTW, memory cgroup's github is here == git://github.com/mstsxfx/memcg-devel.git Since v1, Whole patch designs are changed. In this version, I didn't remove ->pre_destroy() but make it succeed always. There are no asynchronous operation and no big patches. But this introduces 2 changes to cgroup core. After this series, if use_hierarchy==0, all resources will be moved to root cgroup at rmdir() or force_empty(). Brief patch conents are 0001 : my version of compile-fix for linux-next, Aneesh will post his own version. 0002 : fix error code in hugetlb_force_memcg_empty 0003 : add res_counter_uncharge_until() 0004 : use res_counter_uncharge_until() at move_parent() 0005 : move charges to root cgroup at rmdir, if use_hierarchy=0 0006 : clean up mem_cgroup_move_account() 0007 : cgroup : avoid attaching task to cgroup where ->pre_destroy() is running. 0008 : cgroup : avoid creating a new cgroup under a cgroup where ->pre_destroy() is running. 0009 : remove -EINTR from memcg->pre_destroy(). Thanks, -Kame -- 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>