On Tue, Nov 29, 2022 at 10:22:48PM -1000, Tejun Heo wrote: > When a task switches to a new sched_class, the prev and new classes are > notified through ->switched_from() and ->switched_to(), respectively, after > the switching is done. However, a new sched_class needs to prepare the task > state before it is enqueued on the new class for the first time. How and why isn't sched_fork() sufficient?