2017-08-10 16:19 GMT+08:00 Michal Hocko <mhocko@xxxxxxxxxx>: > [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 thanks again, but /proc/sys/vm/drop_caches can't solve it you can try as follow #cat /proc/cgroups memory 11 2 1 #mkdir a #echo 0 > a/cgroup.procs #sleep 1 #echo 0 > cgroup.procs #echo 1 > a/memory.force_empty #echo 3 > /proc/sys/vm/drop_caches #rmdir a #cat /proc/cgroups memory 11 3 1 the num_cgroups not decrease -- 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
