+Kernel module parameters
+~~~~~~~~~~~~~~~~~~~~~~~~
+
+The **mlx4_core** kernel module has several parameters that affect the
+behavior and/or the performance of librte_pmd_mlx4. Some of them are described
+below.
+
+- **num_vfs** (integer or triplet, optionally prefixed by device address
+ strings)
+
+ Create the given number of VFs on the specified devices.
+
+- **log_num_mgm_entry_size** (integer)
+
+ Device-managed flow steering (DMFS) is required by DPDK applications. It is
+ enabled by using a negative value, the last four bits of which have a
+ special meaning.
+
+ - **-1**: force device-managed flow steering (DMFS).
+ - **-7**: configure optimized steering mode to improve performance with the
+ following limitation: Ethernet frames with the port MAC address as the
+ destination cannot be received, even in promiscuous mode. Additional MAC
+ addresses can still be set by ``rte_eth_dev_mac_addr_addr()``.
+