[restoring the CC list] On Thu 10-08-17 17:57:38, wang Yu wrote: > 2017-08-10 17:28 GMT+08:00 wang Yu <yuwang668899@xxxxxxxxx>: [...] > > after drop caches, memory.stat shows not pages belong the group, but > > memory.usage_in_bytes not zero, so maybe other pages > > has wrong to belong this group > > after drop cache, there maybe have kmem pages ,e.g. slab > it can't free both drop cache or tasks free, > so back this problem, without mem_cgroup_reparent_charges, > cgroup v1 can't umount , and cgroup v2 can't mount Ohh, right. It is true that there is no explicit control over kmem page life time. I am afraid this is something non-trivial to address though. I am not sure swithing between cgroup versions is a strong enough use case to implement something like that but you can definitely try to do that. -- Michal Hocko SUSE Labs -- 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/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>
