rcutorture: Print GP age upon forward-progress failure

Signed-off-by: Paul E. McKenney <paulmck@linux.ibm.com>

diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index 90a67c75a447bab2c6f012a0be4e347b405584ed..f916315419651a92fa5ccd24952c30d4db430d0d 100644 (file)
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -2682,6 +2682,8 @@ void rcu_fwd_progress_check(unsigned long j)
        struct rcu_data *rdp;
 
        if (rcu_gp_in_progress()) {
+               pr_info("%s: GP age %lu jiffies\n",
+                       __func__, jiffies - rcu_state.gp_start);
                show_rcu_gp_kthreads();
        } else {
                preempt_disable();