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How do I change the rate-limiting and ownership settings applicable to POSIX locking with GFS and GFS2 file systems in a RHEL Resilient Storage cluster?

Solution Unverified - Updated 2015-09-18T07:34:37+00:00 -

Issue

The rate at which POSIX locks are granted seems to be limited in my cluster. How can I change that rate limit?
lock requests with fcntl are slow
If I change plock_rate_limit or plock_ownership settings in my cluster, do I need to restart the daemons or just propagate the new configuration?

Environment

Red Hat Enterprise Linux (RHEL) 5, 6, or 7 with the Resilient Storage Add On
GFS or GFS2

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