PG_STAT
(newpg->flags & ~PG_STAT) | (oldpg->flags & PG_STAT);
KASSERT((pg->flags & PG_STAT) == 0);
if ((pg->flags & PG_STAT) != 0) {
if ((pg->flags & PG_STAT) != 0) {
if ((pg->flags & PG_STAT) != 0) {