From: Paul E. McKenney <paulmck@linux.ibm.com>
Date: Wed, 3 Oct 2018 18:02:05 +0000 (-0700)
Subject: rcutorture: Print GP age upon forward-progress failure
X-Git-Tag: v5.0-rc1~152^2^2~6
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=8dd3b54689d9a2103c0817f2b7adc51760a45551;p=linux.git

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 90a67c75a447..f91631541965 100644
--- 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();