I am seeing very good performance benefit from offload of decryption
of encrypted SMB3 read responses to a pool of worker threads
(optionally).  See attached patches.

I plan to add another patch to only offload when number of requests in
flight is > 1 (since there is no point offloading and doing a thread
switch if no other responses would overlap in the cifsd thread reading
from the socket).

-- 
Thanks,

Steve