1config GFS2_FS 2 tristate "GFS2 file system support" 3 depends on EXPERIMENTAL && (64BIT || LBDAF) 4 select DLM if GFS2_FS_LOCKING_DLM 5 select CONFIGFS_FS if GFS2_FS_LOCKING_DLM 6 select SYSFS if GFS2_FS_LOCKING_DLM 7 select IP_SCTP if DLM_SCTP 8 select FS_POSIX_ACL 9 select CRC32 10 select QUOTACTL 11 help 12 A cluster filesystem. 13 14 Allows a cluster of computers to simultaneously use a block device 15 that is shared between them (with FC, iSCSI, NBD, etc...). GFS reads 16 and writes to the block device like a local filesystem, but also uses 17 a lock module to allow the computers coordinate their I/O so 18 filesystem consistency is maintained. One of the nifty features of 19 GFS is perfect consistency -- changes made to the filesystem on one 20 machine show up immediately on all other machines in the cluster. 21 22 To use the GFS2 filesystem in a cluster, you will need to enable 23 the locking module below. Documentation and utilities for GFS2 can 24 be found here: http://sources.redhat.com/cluster 25 26 The "nolock" lock module is now built in to GFS2 by default. If 27 you want to use the DLM, be sure to enable HOTPLUG and IPv4/6 28 networking. 29 30config GFS2_FS_LOCKING_DLM 31 bool "GFS2 DLM locking" 32 depends on (GFS2_FS!=n) && NET && INET && (IPV6 || IPV6=n) && HOTPLUG 33 help 34 Multiple node locking module for GFS2 35 36 Most users of GFS2 will require this. It provides the locking 37 interface between GFS2 and the DLM, which is required to use GFS2 38 in a cluster environment. 39