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>

1 files changed, 7 insertions, 0 deletions

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index be7c0d9506b1..110745e7d61f 100644
--- 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.