[ofa-general] missed cq event

[Roland Dreier]

 > Is it possible that there is a bug in OFED 1.3 with regard to non-signaled 
 > send work requests?
 > I noticed that when I post send work requests onto my send queue, It 
 > eventually fills up until I
 > cannot post sends anymore.
 > This happens with the Chelsio T3 RNIC and OFED 1.3 whenever I post send 
 > WR's that have
 > their flags set to 0. It does not happen though when I post sends with 
 > IBV_SEND_SIGNALED.
 > The CQ is empty in the case of non-signaled WR's (as expected) but they 
 > somehow seem to
 > be stuck on the send queue.

This is not a bug.  The unsignaled work requests are not considered
completed until a later signaled work request completes.  So you need to
periodically post a signaled work request, so that you know when the
unsignaled sends have completed.

 - R.