diff options
| author | Matthew Ahrens <[email protected]> | 2014-09-13 16:13:00 +0200 |
|---|---|---|
| committer | Brian Behlendorf <[email protected]> | 2014-09-23 10:00:02 -0700 |
| commit | b8bcca18f709abd3d1b7649ebdcb4aeab1e2eb61 (patch) | |
| tree | f342c4b712ceed9a3b3576b01b878c805a50cdeb /module/zfs | |
| parent | ebcf49365a05fc064bfe6534c2997f3ad6c339e3 (diff) | |
Illumos 5161 - add tunable for number of metaslabs per vdev
5161 add tunable for number of metaslabs per vdev
Reviewed by: Alex Reece <[email protected]>
Reviewed by: Christopher Siden <[email protected]>
Reviewed by: George Wilson <[email protected]>
Reviewed by: Paul Dagnelie <[email protected]>
Reviewed by: Saso Kiselkov <[email protected]>
Reviewed by: Richard Elling <[email protected]>
Approved by: Richard Lowe <[email protected]>
References:
https://www.illumos.org/issues/5161
https://github.com/illumos/illumos-gate/commit/bf3e216
Ported by: Turbo Fredriksson <[email protected]>
Signed-off-by: Brian Behlendorf <[email protected]>
Closes #2698
Diffstat (limited to 'module/zfs')
| -rw-r--r-- | module/zfs/vdev.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/module/zfs/vdev.c b/module/zfs/vdev.c index 7c689b3c8..45315d3a1 100644 --- a/module/zfs/vdev.c +++ b/module/zfs/vdev.c @@ -46,6 +46,12 @@ #include <sys/zvol.h> /* + * When a vdev is added, it will be divided into approximately (but no + * more than) this number of metaslabs. + */ +int metaslabs_per_vdev = 200; + +/* * Virtual device management. */ @@ -1582,9 +1588,9 @@ void vdev_metaslab_set_size(vdev_t *vd) { /* - * Aim for roughly 200 metaslabs per vdev. + * Aim for roughly metaslabs_per_vdev (default 200) metaslabs per vdev. */ - vd->vdev_ms_shift = highbit64(vd->vdev_asize / 200); + vd->vdev_ms_shift = highbit64(vd->vdev_asize / metaslabs_per_vdev); vd->vdev_ms_shift = MAX(vd->vdev_ms_shift, SPA_MAXBLOCKSHIFT); } @@ -3387,4 +3393,9 @@ EXPORT_SYMBOL(vdev_degrade); EXPORT_SYMBOL(vdev_online); EXPORT_SYMBOL(vdev_offline); EXPORT_SYMBOL(vdev_clear); + +module_param(metaslabs_per_vdev, int, 0644); +MODULE_PARM_DESC(metaslabs_per_vdev, + "Divide added vdev into approximately (but no more than) this number " + "of metaslabs"); #endif |