RDMA, net.core.r/wmem_max and max-buffers

Hello All,

I am trying out DRBD with RDMA transport.
The DRBD User guide says that max-buffers must be big enough to hold rcvbuf-size.

How big should these values be for a 200Gbps RoCE/RDMA link?

And is there a relation between rcvbuf-size, max-buffers, and OS settings like net.core.rmem_max and net.core.wmem_max?

Thanks,

Regards,

Indivar Nair