CanOvercommit
virtual bool CanOvercommit();
virtual bool CanOvercommit();
virtual bool CanOvercommit();
if (cache->temporary && !cache->CanOvercommit() && area->page_protections != NULL) {
lowerCache->CanOvercommit(), 0,
if (is_area_only_cache_user(area) && !topCache->CanOvercommit()) {