rcu: Update documentation regarding kthread_prio cmdline parameter

Inform readers that the priority of RCU no-callback threads will also
be boosted.

Signed-off-by: Alison Chaiken <achaiken@aurora.tech>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index f5a27f067db9ed97da621036f111f881d3aa3561..8e2e65122b993622e0e354a46c4c34021b36067a 100644 (file)
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -4504,6 +4504,8 @@
                        (the least-favored priority).  Otherwise, when
                        RCU_BOOST is not set, valid values are 0-99 and
                        the default is zero (non-realtime operation).
+                       When RCU_NOCB_CPU is set, also adjust the
+                       priority of NOCB callback kthreads.
 
        rcutree.rcu_nocb_gp_stride= [KNL]
                        Set the number of NOCB callback kthreads in