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author | Russell Harmon <eatnumber1@gmail.com> | 2023-06-05 08:08:52 +0300 |
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committer | Mike Snitzer <snitzer@kernel.org> | 2023-06-23 01:39:50 +0300 |
commit | 52145f284c66b9de5be7b054444dd0da066079d6 (patch) | |
tree | 09fdfeecfab6be4472358c347a9cc052ffd409c6 /Documentation | |
parent | 3b671459e687e6b7d3f87d39a0b242bbebf871be (diff) | |
download | linux-52145f284c66b9de5be7b054444dd0da066079d6.tar.xz |
Documentation: dm-integrity: Document default values.
Signed-off-by: Russell Harmon <eatnumber1@gmail.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Diffstat (limited to 'Documentation')
-rw-r--r-- | Documentation/admin-guide/device-mapper/dm-integrity.rst | 22 |
1 files changed, 11 insertions, 11 deletions
diff --git a/Documentation/admin-guide/device-mapper/dm-integrity.rst b/Documentation/admin-guide/device-mapper/dm-integrity.rst index 31f514675809..0241457c0027 100644 --- a/Documentation/admin-guide/device-mapper/dm-integrity.rst +++ b/Documentation/admin-guide/device-mapper/dm-integrity.rst @@ -102,7 +102,7 @@ journal_sectors:number device. If the device is already formatted, the value from the superblock is used. -interleave_sectors:number +interleave_sectors:number (default 32768) The number of interleaved sectors. This values is rounded down to a power of two. If the device is already formatted, the value from the superblock is used. @@ -111,16 +111,16 @@ meta_device:device Don't interleave the data and metadata on the device. Use a separate device for metadata. -buffer_sectors:number - The number of sectors in one buffer. The value is rounded down to - a power of two. +buffer_sectors:number (default 128) + The number of sectors in one metadata buffer. The value is rounded + down to a power of two. -journal_watermark:number +journal_watermark:number (default 50) The journal watermark in percents. When the size of the journal exceeds this watermark, the thread that flushes the journal will be started. -commit_time:number +commit_time:number (default 10000) Commit time in milliseconds. When this time passes, the journal is written. The journal is also written immediately if the FLUSH request is received. @@ -168,11 +168,10 @@ journal_mac:algorithm(:key) (the key is optional) the journal. Thus, modified sector number would be detected at this stage. -block_size:number - The size of a data block in bytes. The larger the block size the +block_size:number (default 512) + The size of a data block in bytes. The larger the block size the less overhead there is for per-block integrity metadata. - Supported values are 512, 1024, 2048 and 4096 bytes. If not - specified the default block size is 512 bytes. + Supported values are 512, 1024, 2048 and 4096 bytes. sectors_per_bit:number In the bitmap mode, this parameter specifies the number of @@ -291,7 +290,8 @@ The layout of the formatted block device: Each run contains: * tag area - it contains integrity tags. There is one tag for each - sector in the data area + sector in the data area. The size of this area is always 4KiB or + greater. * data area - it contains data sectors. The number of data sectors in one run must be a power of two. log2 of this value is stored in the superblock. |