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

[Glauber Costa <glommer@parallels.com>]

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.