a method that includes providing lru selection logic which controllably pass requests for access to computer system resources to a shared resource via a first level and a second level , determining whether a request in a request group is active , presenting the request to lru selection logic at the first level , when it is determined that the request is active , determining whether the request is a lru request of the request group at the first level , forwarding the request to the second level when it is determined that the request is the lru request of the request group , comparing the request to an lru request from each of the request groups at the second level to determine whether the request is a lru request of the plurality of request groups , and selecting the lru request of the plurality of request groups to access the shared resource .