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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
This commit is contained in:
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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module/zfs/spa_misc.c
+3 -3
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@@ -2064,11 +2064,11 @@ spa_preferred_class(spa_t *spa, const zio_t *zio)
}
/*
* Allow small file blocks in special class in some cases (like
* for the dRAID vdev feature). But always leave a reserve of
* Allow small file or zvol blocks in special class if opted in by
* the special_smallblk property. However, always leave a reserve of
* zfs_special_class_metadata_reserve_pct exclusively for metadata.
*/
if (DMU_OT_IS_FILE(objtype) &&
if ((DMU_OT_IS_FILE(objtype) || objtype == DMU_OT_ZVOL) &&
has_special_class && zio->io_size <= zp->zp_zpl_smallblk) {
metaslab_class_t *special = spa_special_class(spa);
uint64_t alloc = metaslab_class_get_alloc(special);