UBLK_REFCOUNT_INIT
refcount_set(&io->ref, UBLK_REFCOUNT_INIT);
unsigned sub_refs = UBLK_REFCOUNT_INIT - io->task_registered_buffers;
if (refs != UBLK_REFCOUNT_INIT && refs != 0)
if (unlikely(new_registered_buffers >= UBLK_REFCOUNT_INIT))