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