From afec56b43fd84edd69cb7f32030578bb35e5e1ea Mon Sep 17 00:00:00 2001 From: Brian Behlendorf Date: Fri, 27 Apr 2012 16:20:31 -0700 Subject: [PATCH] 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 --- module/zfs/dmu.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/module/zfs/dmu.c b/module/zfs/dmu.c index 9702d5022..cda4f8428 100644 --- 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