IP-over-InfiniBand debugging

configname: CONFIG_INFINIBAND_IPOIB_DEBUG

Linux Kernel Configuration
└─>Device Drivers
└─>InfiniBand support
└─>IP-over-InfiniBand debugging
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
This option causes debugging code to be compiled into the
IPoIB driver. The output can be turned on via the
debug_level and mcast_debug_level module parameters (which
can also be set after the driver is loaded through sysfs).

This option also creates a directory tree under ipoib/ in
debugfs, which contains files that expose debugging
information about IB multicast groups used by the IPoIB
driver.