[openib-general] ib_mad.h ib_mad_post_send questions and a minor commentary change

[Sean Hefty]

On Mon, 06 Sep 2004 15:36:27 -0700
Roland Dreier <roland at topspin.com> wrote:

>     Hal> Also, if this were to occur in the middle of an RMPP
>     Hal> transaction, should this be detected and any special actions
>     Hal> taken ? Or would this just rely on normal RMPP handling at
>     Hal> the other end to detect any issues ?
> 
> There's no reason for a send request to fail in normal operation, so I
> don't see much that the MAD layer can try to do to recover.  In any
> case, I'd like to see some real code that actually can be used, at
> least in the normal case as soon as possible.  So I would suggest
> deferring secondary issues like this until after we have a working
> implementation.

In such a case, we can just complete the MAD with an error.

 
>     Hal> I also have a related implementation question. The ib_mad
>     Hal> client supplies wr_id in the send WR. If it turns out that it
>     Hal> might be better to use wr_ids in some special encoded way, is
>     Hal> it acceptable to do that as long as the client wr_id is
>     Hal> returned in the send WC ?
> 
> I don't see any reason why not.  Do you see any problems?

I think that's perfectly acceptable.  It may be nice to avoid saving/restoring wr_id, but I'm not sure if it's possible to do that and track RMPP and request/responses.