DLM debugging

configname: CONFIG_DLM_DEBUG

Linux Kernel Configuration
└─>File systems
└─>Distributed Lock Manager (DLM)
└─>DLM debugging
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
Under the debugfs mount point, the name of each lockspace will
appear as a file in the "dlm" directory. The output is the
list of resource and locks the local node knows about.