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Btrfs: add config option to enable btrfs integrity check

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Added the BTRFS_FS_CHECK_INTEGRITY option to Kconfig. It depends on
BTRFS_FS.

Signed-off-by: Stefan Behrens <sbehrens@giantdisaster.de>
This commit is contained in:
Stefan Behrens 2011-11-01 17:06:04 +01:00
parent 5db0276014
commit c975dd469d
1 changed files with 19 additions and 0 deletions
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19
fs/btrfs/Kconfig
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@ -31,3 +31,22 @@ config BTRFS_FS_POSIX_ACL
Linux website <http://acl.bestbits.at/>.
If you don't know what Access Control Lists are, say N
config BTRFS_FS_CHECK_INTEGRITY
bool "Btrfs with integrity check tool compiled in (DANGEROUS)"
depends on BTRFS_FS
help
Adds code that examines all block write requests (including
writes of the super block). The goal is to verify that the
state of the filesystem on disk is always consistent, i.e.,
after a power-loss or kernel panic event the filesystem is
in a consistent state.
If the integrity check tool is included and activated in
the mount options, plenty of kernel memory is used, and
plenty of additional CPU cycles are spent. Enabling this
functionality is not intended for normal use.
In most cases, unless you are a btrfs developer who needs
to verify the integrity of (super)-block write requests
during the run of a regression test, say N