linux-kernel - Re: [PATCH 05/11] Add a __GFP

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Date:	Tue, 26 Jun 2012 11:08:32 +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.hiroyu@...fujitsu.com>, Tejun Heo <tj@...nel.org>,
	Pekka Enberg <penberg@...helsinki.fi>,
	Suleiman Souhlal <suleiman@...gle.com>
Subject: Re: [PATCH 05/11] Add a __GFP_KMEMCG flag

On 06/26/2012 08:25 AM, David Rientjes wrote:
> On Mon, 25 Jun 2012, Glauber Costa wrote:
>
>> >This flag is used to indicate to the callees that this allocation will be
>> >serviced to the kernel. It is not supposed to be passed by the callers
>> >of kmem_cache_alloc, but rather by the cache core itself.
>> >
> Not sure what "serviced to the kernel" means, does this mean that the
> memory will not be accounted for to the root memcg?
>
In this context, it means that is a kernel allocation, not a userspace 
one (but in process context, of course), *and* it is to be accounted a
specific memcg.

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