[openib-general] basic IB doubt

[Woodruff, Robert J]

Catlin wrote,
>Another point, even if a vendor were to implement the firmware
>you suggest, how does the Data Source know that it is safe to
>use just RDMA Writes? The enabling firmware is in the Data Sink.

Huh, don't understand the question.

>Applications certainly do not want to have to validate the model
>of the RNIC that they are connected with.

If ISVs want to use an RNIC that does not support this technique,
then they will have to implement their completion checking
another way, which will be slower, so the hardware NICs that
do not support this fast polling completion technique will be
at a competitive disadvantage. Sometimes you can lead a
horse to water, but you can't make then drink.