linux-kernel - Re: [RFD 1/9] Change cpustat fields to an array.

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Date:	Wed, 28 Sep 2011 12:14:06 -0300
From:	Glauber Costa <glommer@...allels.com>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
CC:	<linux-kernel@...r.kernel.org>, <paul@...lmenage.org>,
	<lizf@...fujitsu.com>, <daniel.lezcano@...e.fr>,
	<jbottomley@...allels.com>
Subject: Re: [RFD 1/9] Change cpustat fields to an array.

On 09/27/2011 06:03 PM, Peter Zijlstra wrote:
> On Fri, 2011-09-23 at 19:20 -0300, Glauber Costa wrote:
>> @@ -623,6 +624,9 @@ static inline struct task_group *task_group(struct
>> task_struct *p)
>>          struct task_group *tg;
>>          struct cgroup_subsys_state *css;
>>
>> +       if (!p->mm)
>> +               return&root_task_group;
>> +
>>          css = task_subsys_state_check(p, cpu_cgroup_subsys_id,
>>                          lockdep_is_held(&p->pi_lock) ||
>>                          lockdep_is_held(&task_rq(p)->lock));
>
> Hmm, why is that? Aren't kthreads part of the cgroup muck just as much
> as normal tasks are?
You're right. I had something else from another work I'm doing in mind 
and got confused.
Will remove it.
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