[openib-general] MAD agent code comments

[Sean Hefty]

Hal Rosenstock wrote:
> Since the agent does not use solicited sends, are its sends completed in
> order (so this is only an issue for clients using solicited sends) ? 

I would think that solicited sends (i.e. responses) would be easier to 
maintain order, since those wouldn't have a timeout.  But my preference 
would be to not defined the API this way.  It makes queuing for QP 
overrun and error handling difficult.

For example, a client posts 2 sends, both of which get queued.  If the 
first send gets posted, but the second send fails when posting to the 
QP, then we'd need to delay reporting the second send's completion. 
This also makes it more difficult to go to multi-threaded completion 
handling, if that were shown to be beneficial.

- Sean