vm_map_madvise
int vm_map_madvise (vm_map_t, vm_offset_t, vm_offset_t, int, off_t);
error = vm_map_madvise(&p->p_vmspace->vm_map, start, end,
error = vm_map_madvise(&p->p_vmspace->vm_map, start, end,
error = vm_map_madvise(&ve->vmspace->vm_map, start, end,