Distributed Lock Manager (DLM)

modulename:  dlm.ko

configname: CONFIG_DLM

Linux Kernel Configuration
└─>File systems
└─>Distributed Lock Manager
└─>Distributed Lock Manager (DLM)
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
A general purpose distributed lock manager for kernel or userspace
applications.

source code:
fs/dlm/
selects
CONFIG_CONFIGFS_FS
CONFIG_IP_SCTP
CONFIG_SRCU

depends
CONFIG_EXPERIMENTAL
CONFIG_INET
CONFIG_IPV6 or CONFIG_CONFIGFS_FS or CONFIG_SYSFS