Function vm_page_pqstate_commit

freebsd/vm/vm_page.c:3505–3525

* A generic queue state update function. This handles more cases than the * specialized functions above. */

 * specialized functions above.
 */
bool
vm_page_pqstate_commit(vm_page_t m, vm_page_astate_t *old, vm_page_astate_t new)
{

	if (old->_bits == new._bits)
		return (true);

	if (old->queue != PQ_NONE && new.queue != old->queue) {
		if (!vm_page_pqstate_commit_dequeue(m, old, new))
			return (false);
		if (new.queue != PQ_NONE)
			vm_page_pqbatch_submit(m, new.queue);
	} else {
		if (!vm_page_pqstate_fcmpset(m, old, new))
			return (false);
		if (new.queue != PQ_NONE &&
		    ((new.flags & ~old->flags) & PGA_QUEUE_OP_MASK) != 0)
			vm_page_pqbatch_submit(m, new.queue);
	}
	return (true);
}

/*
 * Apply deferred queue state updates to a page.