After installing Oracle Linux 6.5, the InfiniBand Host Channel Adapter for PCIExpress card might stop working.
Affected software:
Sun Dual Port QDR InfiniBand Host Channel Adapter for PCIExpress Gen 3 (7104073 and 7104074)
Oracle Linux 6.5
Releases 1.0 and later
Workaround:
Do the following:
Install the Remote Direct Memory Access (RDMA) package from yum or from the operating system installation disk.
Add or unmask " MLX4_LOAD=yes " in the /etc/rdma/rdma.conf file.