linux-kernel - Re: [PATCH 06/11] memcg: kmem controller infrastructure

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Message-ID: <4FEAD351.2030203@parallels.com>
Date:	Wed, 27 Jun 2012 13:33:05 +0400
From:	Glauber Costa <glommer@...allels.com>
To:	David Rientjes <rientjes@...gle.com>
CC:	<cgroups@...r.kernel.org>, <linux-mm@...ck.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	<linux-kernel@...r.kernel.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Pekka Enberg <penberg@...nel.org>,
	Michal Hocko <mhocko@...e.cz>,
	Johannes Weiner <hannes@...xchg.org>,
	Christoph Lameter <cl@...ux.com>, <devel@...nvz.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Tejun Heo <tj@...nel.org>,
	Pekka Enberg <penberg@...helsinki.fi>
Subject: Re: [PATCH 06/11] memcg: kmem controller infrastructure


>>
>> Nothing, but I also don't see how to prevent that.
>
> You can test for current->flags & PF_KTHREAD following the check for
> in_interrupt() and return true, it's what you were trying to do with the
> check for !current->mm.
>

am I right to believe that if not in interrupt context - already ruled 
out - and !(current->flags & PF_KTHREAD), I am guaranteed to have a mm 
context, and thus, don't need to test against it ?

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