(2012/04/18 2:35), Ying Han wrote: > On Thu, Apr 12, 2012 at 4:17 AM, KAMEZAWA Hiroyuki > <kamezawa.hiroyu@xxxxxxxxxxxxxx> wrote: >> In recent discussion, Tejun Heo, cgroup maintainer, has a plan to remove >> ->pre_destroy(). And now, in cgroup tree, pre_destroy() failure cause WARNING. >> >> By pre_destroy(), rmdir of cgroup can return -EBUSY or some error. >> It makes cgroup complicated and unstable. I said O.K. to remove it and >> this patch is modification for memcg. >> >> One of problem in current implementation is that memcg moves all charges to >> parent in pre_destroy(). At doing so, if use_hierarchy=0, pre_destroy() may >> hit parent's limit and may return -EBUSY. To fix this problem, this patch >> changes behavior of rmdir() as >> >> - if use_hierarchy=0, all remaining charges will go to root cgroup. >> - if use_hierarchy=1, all remaining charges will go to the parent. > > > We need to update the "4.3 Removing a cgroup" session in Documentation. > Sure, will do. 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>