linux-kernel - Re: [PATCH v4 04/14] kmem accounting basic infrastructure

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Message-ID: <20121011133855.GG29295@dhcp22.suse.cz>
Date:	Thu, 11 Oct 2012 15:38:56 +0200
From:	Michal Hocko <mhocko@...e.cz>
To:	Glauber Costa <glommer@...allels.com>
Cc:	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Mel Gorman <mgorman@...e.de>,
	Suleiman Souhlal <suleiman@...gle.com>,
	Tejun Heo <tj@...nel.org>, cgroups@...r.kernel.org,
	kamezawa.hiroyu@...fujitsu.com,
	Johannes Weiner <hannes@...xchg.org>,
	Greg Thelen <gthelen@...gle.com>, devel@...nvz.org,
	Frederic Weisbecker <fweisbec@...il.com>
Subject: Re: [PATCH v4 04/14] kmem accounting basic infrastructure

On Thu 11-10-12 12:11:19, Michal Hocko wrote:
> On Mon 08-10-12 14:06:10, Glauber Costa wrote:

> > +	cgroup_lock();
> > +	mutex_lock(&set_limit_mutex);
> > +	if (!memcg->kmem_accounted && val != RESOURCE_MAX) {
> 
> Just a nit but wouldn't memcg_kmem_is_accounted(memcg) be better than
> directly checking kmem_accounted?

OK, I see that jump lable patch changes this and we set activated inside
the conditional so kmem_accounted check catches both flags. That could
be changed to memcg_kmem_is_activated in that patch but what ever.
-- 
Michal Hocko
SUSE Labs
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