Re: [PATCH] cgroup/cpuset: Skip security check for hotplug induced v1 task migration

[Waiman Long]

On 3/27/26 4:22 PM, Tejun Heo wrote:
> On Fri, Mar 27, 2026 at 04:15:46PM -0400, Waiman Long wrote:
> > +	/*
> > +	 * Set to true if a kthread is moving tasks away from a v1 cpuset with
> > +	 * no CPUs
> > +	 */
> > +	kthread_move_task_from_empty_cs = !cpuset_v2() &&
> > +					  cpumask_empty(oldcs->effective_cpus) &&
> > +					  (current->flags & PF_KTHREAD);
> PF_KTHREAD test seems odd. Can't you pass this in as a flag from hotplug
> handler?

Yes, I can added a new CS flag like CS_TASK_MIGRATION in the hotplug 
handler to indicate that task migration is allowed. Thanks for the 
suggestion. I will send a v2 with that change.

Cheers,
Longman