1 # SPDX-License-Identifier: GPL-2.0-only
3 tristate "GFS2 file system support"
13 Allows a cluster of computers to simultaneously use a block device
14 that is shared between them (with FC, iSCSI, NBD, etc...). GFS reads
15 and writes to the block device like a local filesystem, but also uses
16 a lock module to allow the computers coordinate their I/O so
17 filesystem consistency is maintained. One of the nifty features of
18 GFS is perfect consistency -- changes made to the filesystem on one
19 machine show up immediately on all other machines in the cluster.
21 To use the GFS2 filesystem in a cluster, you will need to enable
22 the locking module below. Documentation and utilities for GFS2 can
23 be found here: http://sources.redhat.com/cluster
25 The "nolock" lock module is now built in to GFS2 by default. If
26 you want to use the DLM, be sure to enable IPv4/6 networking.
28 config GFS2_FS_LOCKING_DLM
29 bool "GFS2 DLM locking"
30 depends on (GFS2_FS!=n) && NET && INET && (IPV6 || IPV6=n) && \
31 CONFIGFS_FS && SYSFS && (DLM=y || DLM=GFS2_FS)
33 Multiple node locking module for GFS2
35 Most users of GFS2 will require this. It provides the locking
36 interface between GFS2 and the DLM, which is required to use GFS2
37 in a cluster environment.