1config XFS_FS
   2        tristate "XFS filesystem support"
   3        depends on BLOCK
   4        select EXPORTFS
   5        select LIBCRC32C
   6        help
   7          XFS is a high performance journaling filesystem which originated
   8          on the SGI IRIX platform.  It is completely multi-threaded, can
   9          support large files and large filesystems, extended attributes,
  10          variable block sizes, is extent based, and makes extensive use of
  11          Btrees (directories, extents, free space) to aid both performance
  12          and scalability.
  14          Refer to the documentation at <>
  15          for complete details.  This implementation is on-disk compatible
  16          with the IRIX version of XFS.
  18          To compile this file system support as a module, choose M here: the
  19          module will be called xfs.  Be aware, however, that if the file
  20          system of your root partition is compiled as a module, you'll need
  21          to use an initial ramdisk (initrd) to boot.
  23config XFS_QUOTA
  24        bool "XFS Quota support"
  25        depends on XFS_FS
  26        select QUOTACTL
  27        help
  28          If you say Y here, you will be able to set limits for disk usage on
  29          a per user and/or a per group basis under XFS.  XFS considers quota
  30          information as filesystem metadata and uses journaling to provide a
  31          higher level guarantee of consistency.  The on-disk data format for
  32          quota is also compatible with the IRIX version of XFS, allowing a
  33          filesystem to be migrated between Linux and IRIX without any need
  34          for conversion.
  36          If unsure, say N.  More comprehensive documentation can be found in
  37          README.quota in the xfsprogs package.  XFS quota can be used either
  38          with or without the generic quota support enabled (CONFIG_QUOTA) -
  39          they are completely independent subsystems.
  41config XFS_POSIX_ACL
  42        bool "XFS POSIX ACL support"
  43        depends on XFS_FS
  44        select FS_POSIX_ACL
  45        help
  46          POSIX Access Control Lists (ACLs) support permissions for users and
  47          groups beyond the owner/group/world scheme.
  49          To learn more about Access Control Lists, visit the POSIX ACLs for
  50          Linux website <>.
  52          If you don't know what Access Control Lists are, say N.
  54config XFS_RT
  55        bool "XFS Realtime subvolume support"
  56        depends on XFS_FS
  57        help
  58          If you say Y here you will be able to mount and use XFS filesystems
  59          which contain a realtime subvolume.  The realtime subvolume is a
  60          separate area of disk space where only file data is stored.  It was
  61          originally designed to provide deterministic data rates suitable
  62          for media streaming applications, but is also useful as a generic
  63          mechanism for ensuring data and metadata/log I/Os are completely
  64          separated.  Regular file I/Os are isolated to a separate device
  65          from all other requests, and this can be done quite transparently
  66          to applications via the inherit-realtime directory inode flag.
  68          See the xfs man page in section 5 for additional information.
  70          If unsure, say N.
  72config XFS_WARN
  73        bool "XFS Verbose Warnings"
  74        depends on XFS_FS && !XFS_DEBUG
  75        help
  76          Say Y here to get an XFS build with many additional warnings.
  77          It converts ASSERT checks to WARN, so will log any out-of-bounds
  78          conditions that occur that would otherwise be missed. It is much
  79          lighter weight than XFS_DEBUG and does not modify algorithms and will
  80          not cause the kernel to panic on non-fatal errors.
  82          However, similar to XFS_DEBUG, it is only advisable to use this if you
  83          are debugging a particular problem.
  85config XFS_DEBUG
  86        bool "XFS Debugging support"
  87        depends on XFS_FS
  88        help
  89          Say Y here to get an XFS build with many debugging features,
  90          including ASSERT checks, function wrappers around macros,
  91          and extra sanity-checking functions in various code paths.
  93          Note that the resulting code will be HUGE and SLOW, and probably
  94          not useful unless you are debugging a particular problem.
  96          Say N unless you are an XFS developer, or you play one on TV.
  97 kindly hosted by Redpill Linpro AS, provider of Linux consulting and operations services since 1995.