PGA_SWAP_SPACE
vm_page_aflag_clear(m, PGA_SWAP_FREE | PGA_SWAP_SPACE);
if ((m->a.flags & (PGA_SWAP_SPACE | PGA_SWAP_FREE)) ==
PGA_SWAP_SPACE) {
vm_page_aflag_set(m, PGA_SWAP_SPACE);
if (old == 0 && (m->a.flags & PGA_SWAP_SPACE) != 0)