Verbose debugging output

configname: CONFIG_INFINIBAND_MTHCA_DEBUG

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