Storage system and method for preventing head-of-line blocking in a completion path

摘要

A storage system and method are provided for preventing head-of-line blocking in a completion path. In one embodiment, a storage system is provided that is configured to: determine that a completion queue in a host is too full to store a completion entry; in response to determining that the completion queue in the host is too full to store the completion entry, temporarily store the completion entry in a data structure in the storage system; determine that space has become available in the completion queue in the host to store the completion entry; and in response to determining that space has become available in the completion queue in the host to store the completion entry, store, in the completion queue in the host, the completion entry that was temporarily stored in the data structure in the storage system.