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Add zfs_mdcomp_disable module option

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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 <behlendorf1@llnl.gov>
This commit is contained in:
Brian Behlendorf 2012-04-27 16:20:31 -07:00
parent ad60af8e1b
commit afec56b43f
1 changed files with 3 additions and 0 deletions
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3
module/zfs/dmu.c
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@ -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