vm_page_try_remove_all
object->ref_count != 0 && !vm_page_try_remove_all(p))
!vm_page_try_remove_all(m)) {
bool vm_page_try_remove_all(vm_page_t m);
if (m->dirty == 0 && !vm_page_try_remove_all(m))
if (m->dirty == 0 && !vm_page_try_remove_all(m))
(void)vm_page_try_remove_all(m);
else if (unmap && vm_page_try_remove_all(m))