[ofa-general] Non-Signaled RDMA Read (cxgb3)

[Roland Dreier]

 > Note that I _could_ add code in the driver/lib poll routine to "eat"
 > these cqes.  But there is a fundamental problem in that if the CQ is
 > armed, then the HW _will_ generate an interrupt in this case.  This
 > leads to a "false notification" which breaks the semantics of the
 > notification mechanism.  I'm not sure how bad that is?  To the
 > application, it would receive a notification, then go poll and get
 > nothing.

There's also the issue that these completions take CQ entries... so if
an app provisions a CQ for some amount of completions and then assumes
that posting 100 RDMA reads doesn't use any CQ entries, things break.

Not sure if there is a good way to deal with this quirk really.

 - R.