[openib-general] ib_mad_recv_done_handler questions

[Roland Dreier]

    Sean> * If the underlying driver provides a process_mad routine, a
    Sean> response MAD is allocated every time a MAD is received on QP
    Sean> 0 or 1.  Can we either push this allocation down into the
    Sean> HCA driver, or find an alternative way of interacting
    Sean> between the two drivers that doesn't require this allocation
    Sean> unless a response will be generated?

How about if the MAD layer allocates a response MAD when a MAD is
received, and if the process_mad call doesn't actually generate a
response the MAD layer just stashed the response MAD away to use for
the next receive?  This should keep the number of allocations within 1
of the number of responses actually generated, but save us from
tracking allocations between two layers.

 - R.