1config BTRFS_FS
   2        tristate "Btrfs filesystem (EXPERIMENTAL) Unstable disk format"
   3        depends on EXPERIMENTAL
   4        select LIBCRC32C
   5        select ZLIB_INFLATE
   6        select ZLIB_DEFLATE
   7        select LZO_COMPRESS
   8        select LZO_DECOMPRESS
   9        help
  10          Btrfs is a new filesystem with extents, writable snapshotting,
  11          support for multiple devices and many more features.
  13          Btrfs is highly experimental, and THE DISK FORMAT IS NOT YET
  14          FINALIZED.  You should say N here unless you are interested in
  15          testing Btrfs with non-critical data.
  17          To compile this file system support as a module, choose M here. The
  18          module will be called btrfs.
  20          If unsure, say N.
  23        bool "Btrfs POSIX Access Control Lists"
  24        depends on BTRFS_FS
  25        select FS_POSIX_ACL
  26        help
  27          POSIX Access Control Lists (ACLs) support permissions for users and
  28          groups beyond the owner/group/world scheme.
  30          To learn more about Access Control Lists, visit the POSIX ACLs for
  31          Linux website <>.
  33          If you don't know what Access Control Lists are, say N
  36        bool "Btrfs with integrity check tool compiled in (DANGEROUS)"
  37        depends on BTRFS_FS
  38        help
  39          Adds code that examines all block write requests (including
  40          writes of the super block). The goal is to verify that the
  41          state of the filesystem on disk is always consistent, i.e.,
  42          after a power-loss or kernel panic event the filesystem is
  43          in a consistent state.
  45          If the integrity check tool is included and activated in
  46          the mount options, plenty of kernel memory is used, and
  47          plenty of additional CPU cycles are spent. Enabling this
  48          functionality is not intended for normal use.
  50          In most cases, unless you are a btrfs developer who needs
  51          to verify the integrity of (super)-block write requests
  52          during the run of a regression test, say N
  53 kindly hosted by Redpill Linpro AS, provider of Linux consulting and operations services since 1995.