Let me look into this.
I think I have resolved issue1, the HASHLUTSIZE is set as 128 in driver 1.4.8.
Now only issue2 need a fix, about NIC hang in overload status.
Just to double check what is the connection you have for this NICS? direct attach cable or fiber optic cable LR , SR or CR?
Can you also provide me the steps how you reproduce the issue. e.g the connection, the switch and how you send and data, need more detail to check on this.
This issue has been fixed by seting correct tc_mapping.
Thanks for your support.