diff options
| author | DeHackEd <[email protected]> | 2019-05-07 18:34:42 -0400 |
|---|---|---|
| committer | Brian Behlendorf <[email protected]> | 2019-05-07 15:34:42 -0700 |
| commit | 1f02ecc5a56d08b744b618c641505c451bd9b1e4 (patch) | |
| tree | ef95100108a31467f6695cc5deb62a2f4574da5a | |
| parent | caf9dd209fdcfccabc2f32b3f23c5386ccfb896c (diff) | |
Make zfs_special_class_metadata_reserve_pct into a parameter
Exported and documented a new module parameter.
Reviewed-by: Richard Laager <[email protected]>
Reviewed-by: Brian Behlendorf <[email protected]>
Signed-off-by: DHE <[email protected]>
Closes #8706
| -rw-r--r-- | man/man5/zfs-module-parameters.5 | 14 | ||||
| -rw-r--r-- | module/zfs/spa_misc.c | 5 |
2 files changed, 19 insertions, 0 deletions
diff --git a/man/man5/zfs-module-parameters.5 b/man/man5/zfs-module-parameters.5 index 5c49670f1..5bca12e06 100644 --- a/man/man5/zfs-module-parameters.5 +++ b/man/man5/zfs-module-parameters.5 @@ -2402,6 +2402,20 @@ Default value: \fB16,777,216\fR. .sp .ne 2 .na +\fBzfs_special_class_metadata_reserve_pct\fR (int) +.ad +.RS 12n +Only allow small data blocks to be allocated on the special and dedup vdev +types when the available free space percentage on these vdevs exceeds this +value. This ensures reserved space is available for pool meta data as the +special vdevs approach capacity. +.sp +Default value: \fB25\fR. +.RE + +.sp +.ne 2 +.na \fBzfs_sync_pass_dont_compress\fR (int) .ad .RS 12n diff --git a/module/zfs/spa_misc.c b/module/zfs/spa_misc.c index b3a4a7b12..f4497ca1c 100644 --- a/module/zfs/spa_misc.c +++ b/module/zfs/spa_misc.c @@ -2689,5 +2689,10 @@ MODULE_PARM_DESC(zfs_ddt_data_is_special, module_param(zfs_user_indirect_is_special, int, 0644); MODULE_PARM_DESC(zfs_user_indirect_is_special, "Place user data indirect blocks into the special class"); + +module_param(zfs_special_class_metadata_reserve_pct, int, 0644); +MODULE_PARM_DESC(zfs_special_class_metadata_reserve_pct, + "Small file blocks in special vdevs depends on this much " + "free space available"); /* END CSTYLED */ #endif |