bfq_class_idle
if (bfq_class_idle(bfqq) || bfq_class_idle(new_bfqq) ||
bfq_class_idle(bfqq))
if (bfq_tot_busy_queues(bfqd) > 1 && bfq_class_idle(bfqq))
if (!bfq_class_idle(bfqq))
if (!bfq_bfqq_sync(bfqq) || bfq_class_idle(bfqq) ||
if (bfq_class_idle(bfqq))