linux-kernel - Re: [PATCH v2 2/9] Kernel Memory cgroup

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Date:	Wed, 7 Sep 2011 02:55:48 -0300
From:	Glauber Costa <glommer@...allels.com>
To:	Paul Menage <paul@...lmenage.org>
CC:	<linux-kernel@...r.kernel.org>, <linux-mm@...ck.org>,
	<containers@...ts.osdl.org>, <netdev@...r.kernel.org>,
	<xemul@...allels.com>, "David S. Miller" <davem@...emloft.net>,
	Hiroyouki Kamezawa <kamezawa.hiroyu@...fujitsu.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>
Subject: Re: [PATCH v2 2/9] Kernel Memory cgroup

On 09/07/2011 02:24 AM, Paul Menage wrote:
> On Tue, Sep 6, 2011 at 9:23 PM, Glauber Costa<glommer@...allels.com>  wrote:
>> +
>> +struct kmem_cgroup {
>> +       struct cgroup_subsys_state css;
>> +       struct kmem_cgroup *parent;
>> +};
>
> There's a parent pointer in css.cgroup, so you shouldn't need a
> separate one here.

Ok, I missed that. Thanks

> Most cgroup subsystems define this structure (and the below accessor
> functions) in their .c file rather than exposing it to the world? Does
> this subsystem particularly need it exposed?

Originally I was using it in sock.c and friends. Now, from the last 
submission to this one, most of those uses were substituted. The 
acessors, however, are in kmem_cgroup.h. Reason being I want most of 
them to be inline.

>> +
>> +static struct cgroup_subsys_state *kmem_create(
>> +       struct cgroup_subsys *ss, struct cgroup *cgrp)
>> +{
>> +       struct kmem_cgroup *sk = kzalloc(sizeof(*sk), GFP_KERNEL);
>
> kcg or just cg would be a better name?

I'll go with kcg.
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