1*1da177e4SLinus Torvaldsmenu "XFS support" 2*1da177e4SLinus Torvalds 3*1da177e4SLinus Torvaldsconfig XFS_FS 4*1da177e4SLinus Torvalds tristate "XFS filesystem support" 5*1da177e4SLinus Torvalds select EXPORTFS if NFSD!=n 6*1da177e4SLinus Torvalds help 7*1da177e4SLinus Torvalds XFS is a high performance journaling filesystem which originated 8*1da177e4SLinus Torvalds on the SGI IRIX platform. It is completely multi-threaded, can 9*1da177e4SLinus Torvalds support large files and large filesystems, extended attributes, 10*1da177e4SLinus Torvalds variable block sizes, is extent based, and makes extensive use of 11*1da177e4SLinus Torvalds Btrees (directories, extents, free space) to aid both performance 12*1da177e4SLinus Torvalds and scalability. 13*1da177e4SLinus Torvalds 14*1da177e4SLinus Torvalds Refer to the documentation at <http://oss.sgi.com/projects/xfs/> 15*1da177e4SLinus Torvalds for complete details. This implementation is on-disk compatible 16*1da177e4SLinus Torvalds with the IRIX version of XFS. 17*1da177e4SLinus Torvalds 18*1da177e4SLinus Torvalds To compile this file system support as a module, choose M here: the 19*1da177e4SLinus Torvalds module will be called xfs. Be aware, however, that if the file 20*1da177e4SLinus Torvalds system of your root partition is compiled as a module, you'll need 21*1da177e4SLinus Torvalds to use an initial ramdisk (initrd) to boot. 22*1da177e4SLinus Torvalds 23*1da177e4SLinus Torvaldsconfig XFS_EXPORT 24*1da177e4SLinus Torvalds bool 25*1da177e4SLinus Torvalds default y if XFS_FS && EXPORTFS 26*1da177e4SLinus Torvalds 27*1da177e4SLinus Torvaldsconfig XFS_RT 28*1da177e4SLinus Torvalds bool "Realtime support (EXPERIMENTAL)" 29*1da177e4SLinus Torvalds depends on XFS_FS && EXPERIMENTAL 30*1da177e4SLinus Torvalds help 31*1da177e4SLinus Torvalds If you say Y here you will be able to mount and use XFS filesystems 32*1da177e4SLinus Torvalds which contain a realtime subvolume. The realtime subvolume is a 33*1da177e4SLinus Torvalds separate area of disk space where only file data is stored. The 34*1da177e4SLinus Torvalds realtime subvolume is designed to provide very deterministic 35*1da177e4SLinus Torvalds data rates suitable for media streaming applications. 36*1da177e4SLinus Torvalds 37*1da177e4SLinus Torvalds See the xfs man page in section 5 for a bit more information. 38*1da177e4SLinus Torvalds 39*1da177e4SLinus Torvalds This feature is unsupported at this time, is not yet fully 40*1da177e4SLinus Torvalds functional, and may cause serious problems. 41*1da177e4SLinus Torvalds 42*1da177e4SLinus Torvalds If unsure, say N. 43*1da177e4SLinus Torvalds 44*1da177e4SLinus Torvaldsconfig XFS_QUOTA 45*1da177e4SLinus Torvalds bool "Quota support" 46*1da177e4SLinus Torvalds depends on XFS_FS 47*1da177e4SLinus Torvalds help 48*1da177e4SLinus Torvalds If you say Y here, you will be able to set limits for disk usage on 49*1da177e4SLinus Torvalds a per user and/or a per group basis under XFS. XFS considers quota 50*1da177e4SLinus Torvalds information as filesystem metadata and uses journaling to provide a 51*1da177e4SLinus Torvalds higher level guarantee of consistency. The on-disk data format for 52*1da177e4SLinus Torvalds quota is also compatible with the IRIX version of XFS, allowing a 53*1da177e4SLinus Torvalds filesystem to be migrated between Linux and IRIX without any need 54*1da177e4SLinus Torvalds for conversion. 55*1da177e4SLinus Torvalds 56*1da177e4SLinus Torvalds If unsure, say N. More comprehensive documentation can be found in 57*1da177e4SLinus Torvalds README.quota in the xfsprogs package. XFS quota can be used either 58*1da177e4SLinus Torvalds with or without the generic quota support enabled (CONFIG_QUOTA) - 59*1da177e4SLinus Torvalds they are completely independent subsystems. 60*1da177e4SLinus Torvalds 61*1da177e4SLinus Torvaldsconfig XFS_SECURITY 62*1da177e4SLinus Torvalds bool "Security Label support" 63*1da177e4SLinus Torvalds depends on XFS_FS 64*1da177e4SLinus Torvalds help 65*1da177e4SLinus Torvalds Security labels support alternative access control models 66*1da177e4SLinus Torvalds implemented by security modules like SELinux. This option 67*1da177e4SLinus Torvalds enables an extended attribute namespace for inode security 68*1da177e4SLinus Torvalds labels in the XFS filesystem. 69*1da177e4SLinus Torvalds 70*1da177e4SLinus Torvalds If you are not using a security module that requires using 71*1da177e4SLinus Torvalds extended attributes for inode security labels, say N. 72*1da177e4SLinus Torvalds 73*1da177e4SLinus Torvaldsconfig XFS_POSIX_ACL 74*1da177e4SLinus Torvalds bool "POSIX ACL support" 75*1da177e4SLinus Torvalds depends on XFS_FS 76*1da177e4SLinus Torvalds help 77*1da177e4SLinus Torvalds POSIX Access Control Lists (ACLs) support permissions for users and 78*1da177e4SLinus Torvalds groups beyond the owner/group/world scheme. 79*1da177e4SLinus Torvalds 80*1da177e4SLinus Torvalds To learn more about Access Control Lists, visit the POSIX ACLs for 81*1da177e4SLinus Torvalds Linux website <http://acl.bestbits.at/>. 82*1da177e4SLinus Torvalds 83*1da177e4SLinus Torvalds If you don't know what Access Control Lists are, say N. 84*1da177e4SLinus Torvalds 85*1da177e4SLinus Torvaldsendmenu 86