Re: [RFC][PATCH 11/9] lazy lru free vector for memcg

[Pavel Emelyanov]

[snip]

> @@ -938,6 +1047,7 @@ static int mem_cgroup_force_empty(struct
>  	 * So, we have to do loop here until all lists are empty.
>  	 */
>  	while (mem->res.usage > 0) {
> +		drain_page_cgroup_all();

Shouldn't we wait here till the drain process completes?

>  		if (atomic_read(&mem->css.cgroup->count) > 0)
>  			goto out;
>  		for_each_node_state(node, N_POSSIBLE)
--
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