Long, I notice that smbdirect.c sets the max receive size to 8192. It's tunable, but I'm curious why the default is so large. The SMBDirect protocol normally limits its packets to 1364 bytes. With an SMBDirect credit limit of 255, the present default allocates over 500 pages/connection, in O(2) granularity, when 85 O(1) pages would suffice. Kernel virtual mapping would also be greatly reduced as buffers can be arranged to share, and never extend beyond, a page. Any insight into the 8192? Thanks. Tom.
