We were running ESXi 6.5 and ran into the NFS* bug with our ConnectX-3 Pro interfaces. The fix was put into nmlx4_en 126.96.36.199 and it seemed to work fine for us. We have since upgraded to ESXi v6.7 and it appears this same bug (or one very similar) is back. Is there anyway to tell if whatever got fixed in nmlx4_en 188.8.131.52 is currently fixed in 184.108.40.206-1vmw (the latest available driver)? Symptoms are identical.
*For more details on the NFS bug, see VMware KB 60421.
Why is ConnectX-3 Pro no longer listed on the Mellanox driver page for ESXi 6.7 support?