Function pagedaemon_wakeup

freebsd/vm/vm_pageout.c:2397–2413

* Perform an advisory wakeup of the page daemon. */

 * Perform an advisory wakeup of the page daemon.
 */
void
pagedaemon_wakeup(int domain)
{
	struct vm_domain *vmd;

	vmd = VM_DOMAIN(domain);
	vm_domain_pageout_assert_unlocked(vmd);
	if (curproc == pageproc)
		return;

	if (atomic_fetchadd_int(&vmd->vmd_pageout_wanted, 1) == 0) {
		vm_domain_pageout_lock(vmd);
		atomic_store_int(&vmd->vmd_pageout_wanted, 1);
		wakeup(&vmd->vmd_pageout_wanted);
		vm_domain_pageout_unlock(vmd);
	}
}