2 tristate "XFS filesystem support"
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
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.
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.
25 bool "XFS Quota support"
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
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.
43 bool "XFS POSIX ACL support"
47 POSIX Access Control Lists (ACLs) support permissions for users and
48 groups beyond the owner/group/world scheme.
50 If you don't know what Access Control Lists are, say N.
53 bool "XFS Realtime subvolume support"
56 If you say Y here you will be able to mount and use XFS filesystems
57 which contain a realtime subvolume. The realtime subvolume is a
58 separate area of disk space where only file data is stored. It was
59 originally designed to provide deterministic data rates suitable
60 for media streaming applications, but is also useful as a generic
61 mechanism for ensuring data and metadata/log I/Os are completely
62 separated. Regular file I/Os are isolated to a separate device
63 from all other requests, and this can be done quite transparently
64 to applications via the inherit-realtime directory inode flag.
66 See the xfs man page in section 5 for additional information.
70 config XFS_ONLINE_SCRUB
71 bool "XFS online metadata check support"
75 If you say Y here you will be able to check metadata on a
76 mounted XFS filesystem. This feature is intended to reduce
77 filesystem downtime by supplementing xfs_repair. The key
78 advantage here is to look for problems proactively so that
79 they can be dealt with in a controlled manner.
81 This feature is considered EXPERIMENTAL. Use with caution!
83 See the xfs_scrub man page in section 8 for additional information.
87 config XFS_ONLINE_REPAIR
88 bool "XFS online metadata repair support"
90 depends on XFS_FS && XFS_ONLINE_SCRUB
92 If you say Y here you will be able to repair metadata on a
93 mounted XFS filesystem. This feature is intended to reduce
94 filesystem downtime by fixing minor problems before they cause the
95 filesystem to go down. However, it requires that the filesystem be
96 formatted with secondary metadata, such as reverse mappings and inode
99 This feature is considered EXPERIMENTAL. Use with caution!
101 See the xfs_scrub man page in section 8 for additional information.
106 bool "XFS Verbose Warnings"
107 depends on XFS_FS && !XFS_DEBUG
109 Say Y here to get an XFS build with many additional warnings.
110 It converts ASSERT checks to WARN, so will log any out-of-bounds
111 conditions that occur that would otherwise be missed. It is much
112 lighter weight than XFS_DEBUG and does not modify algorithms and will
113 not cause the kernel to panic on non-fatal errors.
115 However, similar to XFS_DEBUG, it is only advisable to use this if you
116 are debugging a particular problem.
119 bool "XFS Debugging support"
122 Say Y here to get an XFS build with many debugging features,
123 including ASSERT checks, function wrappers around macros,
124 and extra sanity-checking functions in various code paths.
126 Note that the resulting code will be HUGE and SLOW, and probably
127 not useful unless you are debugging a particular problem.
129 Say N unless you are an XFS developer, or you play one on TV.
131 config XFS_ASSERT_FATAL
132 bool "XFS fatal asserts"
134 depends on XFS_FS && XFS_DEBUG
136 Set the default DEBUG mode ASSERT failure behavior.
138 Say Y here to cause DEBUG mode ASSERT failures to result in fatal
139 errors that BUG() the kernel by default. If you say N, ASSERT failures
142 This behavior can be modified at runtime via sysfs.