PG_DELWRI
&& (pg->flags & PG_DELWRI)));
pg->flags |= PG_DELWRI;
if (pgs[i]->flags & PG_DELWRI) {
pgs[i]->flags &= ~PG_DELWRI;
if (pg->flags & PG_DELWRI) {
pg->flags &= ~(PG_DELWRI|PG_PAGEOUT|PG_RELEASED);