[openib-general] ip over ib tx/rx split

[Roland Dreier]

    Michael> Hi!  The following simple patch splits the tx and rx
    Michael> completions for ip over ib to separate cqs.  This shall
    Michael> get better performance on SMP due to reduced cq lock
    Michael> contention.

I tried something similar and even split ipoib_ib_completion() into
two functions (to save dispatching between RX and TX completions).  I
was not able to measure any performance improvement.

In fact I'm not convinced that this should be better, since it may
cause more interrupts and reduce the natural interrupt coalescing
effect that having all completions go to the same queue has.

 - Roland