Add zfs_mdcomp_disable module option

Expose the zfs_mdcomp_disable variable as a module option. This can be used to disable compression of zfs meta data which is enabled by default. This shouldn't need to be tuned but for most workloads, however there may be very specific instances where it makes sense to trade disk capacity for extra cpu cycles. Signed-off-by: Brian Behlendorf <[email protected]>
behlendorf · Apr 27, 2012 · afec56b · afec56b
1 parent ad60af8
commit afec56b
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/module/zfs/dmu.c b/module/zfs/dmu.c
@@ -1900,4 +1900,7 @@ EXPORT_SYMBOL(dmu_return_arcbuf);
 EXPORT_SYMBOL(dmu_assign_arcbuf);
 EXPORT_SYMBOL(dmu_buf_hold);
 EXPORT_SYMBOL(dmu_ot);
+
+module_param(zfs_mdcomp_disable, int, 0644);
+MODULE_PARM_DESC(zfs_mdcomp_disable, "Disable meta data compression");
 #endif