Specifically:
interleave_sectors = 32768
buffer_sectors = 128
block_size = 512
journal_watermark = 50
commit_time = 10000
Signed-off-by: Russell Harmon <eatnumber1@xxxxxxxxx>
---
.../device-mapper/dm-integrity.rst | 22 +++++++++----------
1 file 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.
--
2.34.1
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