// Ms that may be preparing to drop their P.
		sched.needspinning.Store(1)
		return nil, now
	}

	return pp, now
}

// runqempty reports whether pp has no Gs on its local run queue.
// It never returns true spuriously.
func runqempty(pp *p) bool {
	// Defend against a race where 1) pp has G1 in runqnext but runqhead == runqtail,