The LOCK_NOLOCK system allows GFS to be used as a local file system on a single node.
The kernel module for a GFS/LOCK_NOLOCK node is lock_nolock.o. The lock protocol as specified when creating a GFS/LOCK_NOLOCK file system is called lock_nolock (lower case, with no .o extension).
Do not allow multiple nodes to mount the same file system while LOCK_NOLOCK is used. Doing so causes one or more nodes to panic their kernels, and may cause file system corruption.