Hello,
I have a 100G Mellanox RDMA NIC (MT27800 Family [ConnectX-5]) installed for RoCE and setup lossy RoCE Accelerations according to https://community.mellanox.com/s/article/How-to-Enable-Disable-Lossy-RoCE-Accelerations.
However after enabling these feature RDMA Writes larger than the MTU which have previously been fragmented into RDMA Write {First, Middle, Last} are only sent as multiple RDMA Write Only.
Is this intended behaviour? (see attached packet dump)
Another thing I observed is that now If sending multiple packets, a few RDMA Write packets have the request-ACK bit set even though they are not the last packet of a fragmented write. This was not the case without Lossy RoCE Accel. enabled.
Best regards,
Matthias
