PQ_SWAPBACKED
KASSERT((pg->pg_flags & PQ_SWAPBACKED) != 0);
if (p->pg_flags & PQ_SWAPBACKED) {
if ((p->pg_flags & PQ_SWAPBACKED) && uvm_swapisfull()) {
if ((p->pg_flags & PQ_SWAPBACKED) && uvm_swapisfilled())
swap_backed = ((p->pg_flags & PQ_SWAPBACKED) != 0);
if (p->pg_flags & PQ_SWAPBACKED) {