* be picked and dropped, the most likely candidate for drop, i.e. the
* current LRU key, is always picked. The LRU logic requires maintaining
* specific data structures per each bucket. Use-cases: flow cache, etc.
* be picked and dropped, the most likely candidate for drop, i.e. the
* current LRU key, is always picked. The LRU logic requires maintaining
* specific data structures per each bucket. Use-cases: flow cache, etc.