NFS Client Changes Bring Some Optimizations For Linux 4.20~5.0
Most significant appears to be an overhaul to the RPC client socket code to eliminate a locking bottleneck and reducing latency when handling lots of requests in parallel. Additionally there is parallelization support within the RPCSEC_GSS encoding of an RPC request, improved efficiency within the RPC client socket receive code, and several look-up operations were converted to use RCUs rather than global locks.
There are also clean-ups around NFS v4.2 copy-completion code, various fixes, RPC/RDMA connection work, and other code improvements. The complete list of details can be found via this pull request.