Function vm_reserv_populate

freebsd/vm/vm_reserv.c:568–608

* Increases the given reservation's population count. Moves the reservation * to the tail of the partially populated reservation queue. */

 * to the tail of the partially populated reservation queue.
 */
static void
vm_reserv_populate(vm_reserv_t rv, int index)
{

	vm_reserv_assert_locked(rv);
	CTR5(KTR_VM, "%s: rv %p object %p popcnt %d inpartpop %d",
	    __FUNCTION__, rv, rv->object, rv->popcnt, rv->inpartpopq);
	KASSERT(rv->object != NULL,
	    ("vm_reserv_populate: reserv %p is free", rv));
	KASSERT(popmap_is_clear(rv->popmap, index),
	    ("vm_reserv_populate: reserv %p's popmap[%d] is set", rv,
	    index));
	KASSERT(rv->popcnt < VM_LEVEL_0_NPAGES,
	    ("vm_reserv_populate: reserv %p is already full", rv));
	KASSERT(rv->pages->psind == 0,
	    ("vm_reserv_populate: reserv %p is already promoted", rv));
	KASSERT(rv->domain < vm_ndomains,
	    ("vm_reserv_populate: reserv %p's domain is corrupted %d",
	    rv, rv->domain));
	popmap_set(rv->popmap, index);
	rv->popcnt++;
	if ((unsigned)(ticks - rv->lasttick) < PARTPOPSLOP &&
	    rv->inpartpopq && rv->popcnt != VM_LEVEL_0_NPAGES)
		return;
	rv->lasttick = ticks;
	vm_reserv_domain_lock(rv->domain);
	if (rv->inpartpopq) {
		TAILQ_REMOVE(&vm_rvd[rv->domain].partpop, rv, partpopq);
		rv->inpartpopq = FALSE;
	}
	if (rv->popcnt < VM_LEVEL_0_NPAGES) {
		rv->inpartpopq = TRUE;
		TAILQ_INSERT_TAIL(&vm_rvd[rv->domain].partpop, rv, partpopq);
	} else {
		KASSERT(rv->pages->psind == 0,
		    ("vm_reserv_populate: reserv %p is already promoted",
		    rv));
		rv->pages->psind = 1;
	}
	vm_reserv_domain_unlock(rv->domain);
}

/*
 * Allocates a contiguous set of physical pages of the given size "npages"