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vdev: expose zfs_vdev_max_ms_shift as a module parameter 

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Tino Reichardt <milky-zfs@mcmilk.de>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Signed-off-by: Rob Norris <rob.norris@klarasystems.com>
Sponsored-by: Klara, Inc.
Sponsored-by: Seagate Technology LLC
Closes #14719
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Rob N 2023-04-07 03:52:50 +10:00 committed by GitHub
parent a8a127e2c9
commit ff73574cd8
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2 changed files with 9 additions and 3 deletions
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5
man/man4/zfs.4
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@ -357,7 +357,10 @@ and the allocation can't actually be satisfied
When a vdev is added, target this number of metaslabs per top-level vdev.
.
.It Sy zfs_vdev_default_ms_shift Ns = Ns Sy 29 Po 512 MiB Pc Pq uint
Default limit for metaslab size.
Default lower limit for metaslab size.
.
.It Sy zfs_vdev_max_ms_shift Ns = Ns Sy 34 Po 16 GiB Pc Pq uint
Default upper limit for metaslab size.
.
.It Sy zfs_vdev_max_auto_ashift Ns = Ns Sy 14 Pq uint
Maximum ashift used when optimizing for logical \[->] physical sector size on

7
module/zfs/vdev.c
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@ -96,7 +96,7 @@ static uint_t zfs_vdev_ms_count_limit = 1ULL << 17;
static uint_t zfs_vdev_default_ms_shift = 29;
/* upper limit for metaslab size (16G) */
static const uint_t zfs_vdev_max_ms_shift = 34;
static uint_t zfs_vdev_max_ms_shift = 34;
int vdev_validate_skip = B_FALSE;
@ -6288,7 +6288,10 @@ ZFS_MODULE_PARAM(zfs_vdev, zfs_vdev_, default_ms_count, UINT, ZMOD_RW,
"Target number of metaslabs per top-level vdev");
ZFS_MODULE_PARAM(zfs_vdev, zfs_vdev_, default_ms_shift, UINT, ZMOD_RW,
"Default limit for metaslab size");
"Default lower limit for metaslab size");
ZFS_MODULE_PARAM(zfs_vdev, zfs_vdev_, max_ms_shift, UINT, ZMOD_RW,
"Default upper limit for metaslab size");
ZFS_MODULE_PARAM(zfs_vdev, zfs_vdev_, min_ms_count, UINT, ZMOD_RW,
"Minimum number of metaslabs per top-level vdev");