diff options
author | delphij <delphij@FreeBSD.org> | 2014-10-20 21:53:51 +0000 |
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committer | delphij <delphij@FreeBSD.org> | 2014-10-20 21:53:51 +0000 |
commit | ac9149e73f8a61253bb7362405974c8a649ef34c (patch) | |
tree | 85308600231ae47ed41729ee647da1932b2e6248 /sys/cddl | |
parent | c02aa9ff18ddc7138b1999ff0eba11fc94bb5113 (diff) | |
download | FreeBSD-src-ac9149e73f8a61253bb7362405974c8a649ef34c.zip FreeBSD-src-ac9149e73f8a61253bb7362405974c8a649ef34c.tar.gz |
MFC r272507: MFV r272496:
Add tunable for number of metaslabs per vdev
(vfs.zfs.vdev.metaslabs_per_vdev). The default remains
at 200.
Illumos issue:
5161 add tunable for number of metaslabs per vdev
Diffstat (limited to 'sys/cddl')
-rw-r--r-- | sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev.c b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev.c index 7eac42c..dea1a8f 100644 --- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev.c +++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev.c @@ -156,6 +156,15 @@ static vdev_ops_t *vdev_ops_table[] = { /* + * When a vdev is added, it will be divided into approximately (but no + * more than) this number of metaslabs. + */ +int metaslabs_per_vdev = 200; +SYSCTL_INT(_vfs_zfs_vdev, OID_AUTO, metaslabs_per_vdev, CTLFLAG_RDTUN, + &metaslabs_per_vdev, 0, + "When a vdev is added, how many metaslabs the vdev should be divided into"); + +/* * Given a vdev type, return the appropriate ops vector. */ static vdev_ops_t * @@ -1663,9 +1672,9 @@ 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); } |