[ofa-general] IB credit-based flow control

[Andy Grover]

Andy Grover wrote:
> How would I verify that? I'm using current HCAs (mlx4), so I'm assuming 
> if the spec says an HCA must support something, is is supported?
> 
> We definitely still need ulp-level flow control for iwarp so it's not 
> wasted work. But if IB doesn't, then it would be great to not incur the 
> overhead.

Mystery solved, RDS has ulp-level flow control specifically to support 
iwarp, so this is not needed on IB connections, due to the HW FC we've 
been discussing.

Thanks -- Regards -- Andy