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Allow opt-in of zvol blocks in special class

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Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Reviewed-by: Kjeld Schouten <kjeld@schouten-lebbing.nl>
Signed-off-by: Don Brady <dev.fs.zfs@gmail.com>
Closes #14876
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Don Brady
2025-05-24 14:44:26 -06:00
committed by GitHub
parent 9d76950d67
commit b048bfa9c1
8 changed files with 75 additions and 10 deletions
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man/man7/zfsprops.7
+2 -2
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@@ -1281,12 +1281,12 @@ This feature must be enabled to be used
.Pc .
.It Sy special_small_blocks Ns = Ns Ar size
This value represents the threshold block size for including small file
blocks into the special allocation class.
or zvol blocks into the special allocation class.
Blocks smaller than or equal to this
value will be assigned to the special allocation class while greater blocks
will be assigned to the regular class.
Valid values are zero or a power of two from 512 up to 1048576 (1 MiB).
The default size is 0 which means no small file blocks
The default size is 0 which means no small file or zvol blocks
will be allocated in the special class.
.Pp
Before setting this property, a special class vdev must be added to the