[Please do not top-post] On Thu 10-08-17 16:10:45, wang Yu wrote: > at first ,thanks for your reply. > but i also tested what you said, the problem is also. > force_empty only call try_to_free_pages, not all the pages remove > because mem_cgroup_reparent_charges moved Right. An alternative would be dropping the page cache globaly via /proc/sys/vm/drop_caches. Not an ideal solution but it should help. -- Michal Hocko SUSE Labs -- 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