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