linux/fs/gfs2/Kconfig
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   1config GFS2_FS
   2        tristate "GFS2 file system support"
   3        depends on (64BIT || LBDAF)
   4        select FS_POSIX_ACL
   5        select CRC32
   6        select QUOTACTL
   7        help
   8          A cluster filesystem.
   9
  10          Allows a cluster of computers to simultaneously use a block device
  11          that is shared between them (with FC, iSCSI, NBD, etc...).  GFS reads
  12          and writes to the block device like a local filesystem, but also uses
  13          a lock module to allow the computers coordinate their I/O so
  14          filesystem consistency is maintained.  One of the nifty features of
  15          GFS is perfect consistency -- changes made to the filesystem on one
  16          machine show up immediately on all other machines in the cluster.
  17
  18          To use the GFS2 filesystem in a cluster, you will need to enable
  19          the locking module below. Documentation and utilities for GFS2 can
  20          be found here: http://sources.redhat.com/cluster
  21
  22          The "nolock" lock module is now built in to GFS2 by default. If
  23          you want to use the DLM, be sure to enable HOTPLUG and IPv4/6
  24          networking.
  25
  26config GFS2_FS_LOCKING_DLM
  27        bool "GFS2 DLM locking"
  28        depends on (GFS2_FS!=n) && NET && INET && (IPV6 || IPV6=n) && \
  29                HOTPLUG && DLM && CONFIGFS_FS && SYSFS
  30        help
  31          Multiple node locking module for GFS2
  32
  33          Most users of GFS2 will require this. It provides the locking
  34          interface between GFS2 and the DLM, which is required to use GFS2
  35          in a cluster environment.
  36
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