// just using, ensuring work can complete.
		return nil, now
	}

	decIfPositive := func(val *atomic.Int64) bool {
		for {
			v := val.Load()
			if v <= 0 {
				return false
			}

			if val.CompareAndSwap(v, v-1) {
				return true
			}
		}
	}

	if decIfPositive(&c.dedicatedMarkWorkersNeeded) {
		// This P is now dedicated to marking until the end of