1 files changed, 9 insertions, 3 deletions

diff --git a/kernel/rcutree_plugin.h b/kernel/rcutree_plugin.h
index 18d9c91f25d1..d81e3856fa91 100644
--- a/kernel/rcutree_plugin.h
+++ b/kernel/rcutree_plugin.h
@@ -1630,17 +1630,23 @@ module_param(rcu_idle_lazy_gp_delay, int, 0644);
 extern int tick_nohz_enabled;
 
 /*
- * Try to advance callbacks for all flavors of RCU on the current CPU.
- * Afterwards, if there are any callbacks ready for immediate invocation,
- * return true.
+ * Try to advance callbacks for all flavors of RCU on the current CPU, but
+ * only if it has been awhile since the last time we did so.  Afterwards,
+ * if there are any callbacks ready for immediate invocation, return true.
  */
 static bool rcu_try_advance_all_cbs(void)
 {
         bool cbs_ready = false;
         struct rcu_data *rdp;
+        struct rcu_dynticks *rdtp = this_cpu_ptr(&rcu_dynticks);
         struct rcu_node *rnp;
         struct rcu_state *rsp;
 
+        /* Exit early if we advanced recently. */
+        if (jiffies == rdtp->last_advance_all)
+                return 0;
+        rdtp->last_advance_all = jiffies;
+
         for_each_rcu_flavor(rsp) {
                 rdp = this_cpu_ptr(rsp->rda);
                 rnp = rdp->mynode;