[ofiwg] send/recv "credits"

[Reese Faucette (rfaucett)]

> Jumping in late on this thread. Not all apps need to undo work if send
> credits are not available. i.e.
> 
> Prep = Do_prep_work();
> If (post_send() != OK) {
> 	Queue_for_later(prep);
> }

Agreed - EAGAIN  is perfect for some apps, just not all of them, or even all the important ones.

> MPI for example can follow this model

Can, yes, but the efficiency depends on the particular MPI implementation.
-reese