Commits on Sep 22, 2021

1. irdma: Remove optimization algorithm for QP doorbell …

   Remove optimization algorithm for QP doorbell, because
   without an mfence the algorithm incorrectly skips ringing
   the doorbell. This causes applicaitons like OpenMPI with
   high number of connections to stall waiting for completion.
   
   Enforcing the order of the write of the WQE valid bit
   and the read of the SQ tail is required by the algorithm,
   but furher investigation is necessary because this does not
   appear sufficient for the algorithm to work. In the meantime,
   remove the doorbell optimization and fix the MPI failures.
   
   Signed-off-by: Tatyana Nikolova <tatyana.e.nikolova@intel.com>
   Signed-off-by: Leon Romanovsky <leonro@nvidia.com>

   

   tatyana-en authored and rleon committed Sep 22, 2021
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