linux-kernel - Re: [PATCH 09/11] memcg: propagate kmem limiting information to children

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Message-ID: <alpine.DEB.2.00.1206252224350.30072@chino.kir.corp.google.com>
Date:	Mon, 25 Jun 2012 22:24:44 -0700 (PDT)
From:	David Rientjes <rientjes@...gle.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
cc:	Glauber Costa <glommer@...allels.com>, cgroups@...r.kernel.org,
	linux-mm@...ck.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 09/11] memcg: propagate kmem limiting information to
 children

On Mon, 25 Jun 2012, Andrew Morton wrote:

> > --- a/mm/memcontrol.c
> > +++ b/mm/memcontrol.c
> > @@ -287,7 +287,11 @@ struct mem_cgroup {
> >  	 * Should the accounting and control be hierarchical, per subtree?
> >  	 */
> >  	bool use_hierarchy;
> > -	bool kmem_accounted;
> > +	/*
> > +	 * bit0: accounted by this cgroup
> > +	 * bit1: accounted by a parent.
> > +	 */
> > +	volatile unsigned long kmem_accounted;
> 
> I suggest
> 
> 	unsigned long kmem_accounted;	/* See KMEM_ACCOUNTED_*, below */
> 
> >  	bool		oom_lock;
> >  	atomic_t	under_oom;
> > @@ -340,6 +344,9 @@ struct mem_cgroup {
> >  #endif
> >  };
> >  
> > +#define KMEM_ACCOUNTED_THIS	0
> > +#define KMEM_ACCOUNTED_PARENT	1
> 
> And then document the fields here.
> 

In hex, please?
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