Bug ID 17899109
After installing Oracle Linux 6.5, the InfiniBand PCIe Host Channel Adapter card might stop working.
Affected hardware and software:
Sun Fire X4170 M2 Server
Sun Fire X4270 M2 Server
Sun Dual Port QDR InfiniBand Host Channel Adapter for PCIExpress Gen 3 (7104073 and 7104074)
Oracle Linux 6.5
Releases 1.7.6 through 1.10.1
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.