Hi, Tom

Thanks for the comments :-)

On 03/31/2015 01:19 PM, Tom Talpey wrote:

[snip]

quoted

Actually I'm thinking about Doug's idea to use rdma_transport_is_XX()
instead of the current basic helper, thus may be use rdma_transport_is_iwarp()
in here could be better, since it's actually a feature of iwarp tech
that RDMA Read only support one scatter-gather entry.

No, you should expose an attribute to surface the maximum length of
the remote gather list, which varies by adapter as well as protocol.
The fact that iWARP is different from IB is not relevant, and conflates
unrelated properties.

To be confirmed, so your point is that the max-read-sges will be different
even the transport is the same IWRAP, and that depends on the capability
of adapter, correct?

I currently only find this one place where infer max-read-sges from
transport type, it looks more like a special case to me rather than a generic
method we could exposed... and also  not very related with IB management
helper concept IMHO.

Regards,
Michael Wang