Re: [PATCH next] cpuset: Treat tasks in attaching process as populated

[Waiman Long <llong@redhat.com>]

On 11/11/25 9:01 AM, Michal Koutný wrote:
> Hi Ridong.
>
> On Tue, Nov 11, 2025 at 01:26:32PM +0000, Chen Ridong <chenridong@huaweicloud.com> wrote:
> ...
>> +static inline bool cs_is_populated(struct cpuset *cs)
>> +{
>> +	/* Tasks in the process of attaching should be considered as populated */
>> +	return cgroup_is_populated(cs->css.cgroup) ||
>> +		cs->attach_in_progress;
>> +}
> s/process/cpuset/ in the subject
> and
> s/Tasks/Cpusets/ in the comment above
Agreed.
> Also, should there be some lockdep_assert_held() in this helper (for
> documentation purposes but also for correctly synchronized validity of
> the returned value.)

A lockdep_assert_held() is certainly needed if it is an externally 
visible helper that can be called outside cpuset. For internal helper 
like this one, we may not really need that as almost all the code in 
cpuset.c are within either a cpuset_mutex or callback_lock critical 
sections. So I am fine with or without it.

Cheers,
Longman