1 config XFS_FS 2 tristate "XFS filesystem support" 3 depends on BLOCK 4 depends on (64BIT || LBDAF) 5 select EXPORTFS 6 select LIBCRC32C 7 help 8 XFS is a high performance journaling filesystem which originated 9 on the SGI IRIX platform. It is completely multi-threaded, can 10 support large files and large filesystems, extended attributes, 11 variable block sizes, is extent based, and makes extensive use of 12 Btrees (directories, extents, free space) to aid both performance 13 and scalability. 14 15 Refer to the documentation at <http://oss.sgi.com/projects/xfs/> 16 for complete details. This implementation is on-disk compatible 17 with the IRIX version of XFS. 18 19 To compile this file system support as a module, choose M here: the 20 module will be called xfs. Be aware, however, that if the file 21 system of your root partition is compiled as a module, you'll need 22 to use an initial ramdisk (initrd) to boot. 23 24 config XFS_QUOTA 25 bool "XFS Quota support" 26 depends on XFS_FS 27 select QUOTACTL 28 help 29 If you say Y here, you will be able to set limits for disk usage on 30 a per user and/or a per group basis under XFS. XFS considers quota 31 information as filesystem metadata and uses journaling to provide a 32 higher level guarantee of consistency. The on-disk data format for 33 quota is also compatible with the IRIX version of XFS, allowing a 34 filesystem to be migrated between Linux and IRIX without any need 35 for conversion. 36 37 If unsure, say N. More comprehensive documentation can be found in 38 README.quota in the xfsprogs package. XFS quota can be used either 39 with or without the generic quota support enabled (CONFIG_QUOTA) - 40 they are completely independent subsystems. 41 42 config XFS_POSIX_ACL 43 bool "XFS POSIX ACL support" 44 depends on XFS_FS 45 select FS_POSIX_ACL 46 help 47 POSIX Access Control Lists (ACLs) support permissions for users and 48 groups beyond the owner/group/world scheme. 49 50 To learn more about Access Control Lists, visit the POSIX ACLs for 51 Linux website <http://acl.bestbits.at/>. 52 53 If you don't know what Access Control Lists are, say N. 54 55 config XFS_RT 56 bool "XFS Realtime subvolume support" 57 depends on XFS_FS 58 help 59 If you say Y here you will be able to mount and use XFS filesystems 60 which contain a realtime subvolume. The realtime subvolume is a 61 separate area of disk space where only file data is stored. It was 62 originally designed to provide deterministic data rates suitable 63 for media streaming applications, but is also useful as a generic 64 mechanism for ensuring data and metadata/log I/Os are completely 65 separated. Regular file I/Os are isolated to a separate device 66 from all other requests, and this can be done quite transparently 67 to applications via the inherit-realtime directory inode flag. 68 69 See the xfs man page in section 5 for additional information. 70 71 If unsure, say N. 72 73 config XFS_WARN 74 bool "XFS Verbose Warnings" 75 depends on XFS_FS && !XFS_DEBUG 76 help 77 Say Y here to get an XFS build with many additional warnings. 78 It converts ASSERT checks to WARN, so will log any out-of-bounds 79 conditions that occur that would otherwise be missed. It is much 80 lighter weight than XFS_DEBUG and does not modify algorithms and will 81 not cause the kernel to panic on non-fatal errors. 82 83 However, similar to XFS_DEBUG, it is only advisable to use this if you 84 are debugging a particular problem. 85 86 config XFS_DEBUG 87 bool "XFS Debugging support" 88 depends on XFS_FS 89 help 90 Say Y here to get an XFS build with many debugging features, 91 including ASSERT checks, function wrappers around macros, 92 and extra sanity-checking functions in various code paths. 93 94 Note that the resulting code will be HUGE and SLOW, and probably 95 not useful unless you are debugging a particular problem. 96 97 Say N unless you are an XFS developer, or you play one on TV.