IP-over-InfiniBand data path debugging

configname: CONFIG_INFINIBAND_IPOIB_DEBUG_DATA

Linux Kernel Configuration
└─>Device Drivers
└─>InfiniBand support
└─>IP-over-InfiniBand data path debugging
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
This option compiles debugging code into the data path
of the IPoIB driver. The output can be turned on via the
data_debug_level module parameter; however, even with output
turned off, this debugging code will have some performance
impact.