[openib-general] agent_mad_send

Wed Oct 27 09:42:14 PDT 2004

On Tue, 26 Oct 2004 21:17:34 -0700
Roland Dreier <roland at topspin.com> wrote:

>     Sean> In agent_mad_send, a call is made to create an address
>     Sean> handle.  Immediately after calling ib_post_send_mad, the
>     Sean> address handle is destroyed.  I think that we want to wait
>     Sean> until the send is completed before destroying the address
>     Sean> handle, and require this of all callers of ib_post_send_mad.
> 
> Yes, that's correct.  Because of a quirk in the way Mellanox HCA's
> implement special QPs, it's actually OK to destroy the AH immediately
> after posting the send, but for an ordinary QP this will lead to some
> bizarre problems.

I'm concerned about handling QP overrun cases, where the call to ib_post_send_mad doesn't immediately post to the QP.

- Sean