Re: [RFC] Repeated rto_push_irq_work_func() invocation.

[Steven Rostedt]

On Wed, 2 Oct 2024 13:21:05 +0200
Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx> wrote:

> Would it make sense to avoid scheduling rto_push_work if rq->curr has
> NEED_RESCHED set and make the scheduler do push_rt_task()?

Can we safely check rq->curr without taking any locks on that CPU?

I guess tasks do not get freed while a CPU has preemption disabled, so it
may be safe to do:

	task = READ_ONCE(rq->curr);
	if (test_task_need_resched(task))
		/* skip */

??

-- Steve