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

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Message-ID: <48CFA549.5010500@openvz.org>
Date:	Tue, 16 Sep 2008 16:23:37 +0400
From:	Pavel Emelyanov <xemul@...nvz.org>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
CC:	balbir@...ux.vnet.ibm.com, "hugh@...itas.com" <hugh@...itas.com>,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	menage@...gle.com, Dave Hansen <haveblue@...ibm.com>,
	"nickpiggin@...oo.com.au" <nickpiggin@...oo.com.au>
Subject: Re: [RFC][PATCH 11/9] lazy lru free vector for memcg

[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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