doc: Add rcutree.rcu_kick_kthreads to kernel-parameters.txt

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index be7c0d9506b12072219f0396ceb9072eeea03df8..110745e7d61f89bd57bd580af148c6654a985dc3 100644 (file)
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -3278,6 +3278,13 @@
                        Lazy RCU callbacks are those which RCU can
                        prove do nothing more than free memory.
 
+       rcutree.rcu_kick_kthreads= [KNL]
+                       Cause the grace-period kthread to get an extra
+                       wake_up() if it sleeps three times longer than
+                       it should at force-quiescent-state time.
+                       This wake_up() will be accompanied by a
+                       WARN_ONCE() splat and an ftrace_dump().
+
        rcuperf.gp_exp= [KNL]
                        Measure performance of expedited synchronous
                        grace-period primitives.