lru_cache_disabled
if (lru_cache_disabled() || cpu_is_isolated(smp_processor_id())) {
!folio_may_be_lru_cached(folio) || lru_cache_disabled())
!folio_may_be_lru_cached(folio) || lru_cache_disabled())
!folio_may_be_lru_cached(folio) || lru_cache_disabled())
!folio_may_be_lru_cached(folio) || lru_cache_disabled())