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Documentation: dm-integrity: Document an example of how the tunables relate.

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Signed-off-by: Russell Harmon <eatnumber1@gmail.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
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Russell Harmon 2023-06-04 22:08:53 -07:00 committed by Mike Snitzer
parent 52145f284c
commit 2971c05874
1 changed files with 6 additions and 0 deletions
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6
Documentation/admin-guide/device-mapper/dm-integrity.rst
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@ -213,6 +213,12 @@ table and swap the tables with suspend and resume). The other arguments
should not be changed when reloading the target because the layout of disk
data depend on them and the reloaded target would be non-functional.
For example, on a device using the default interleave_sectors of 32768, a
block_size of 512, and an internal_hash of crc32c with a tag size of 4
bytes, it will take 128 KiB of tags to track a full data area, requiring
256 sectors of metadata per data area. With the default buffer_sectors of
128, that means there will be 2 buffers per metadata area, or 2 buffers
per 16 MiB of data.
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