Commit-ID: 034777d7f5c6bc5326184ffa63b7a840ef0e9759
Gitweb: https://git.kernel.org/tip/034777d7f5c6bc5326184ffa63b7a840ef0e9759
Author: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
AuthorDate: Thu, 19 Apr 2018 08:43:11 -0700
Committer: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
CommitDate: Tue, 15 May 2018 10:32:08 -0700
rcutorture: Print end-of-test state
This commit adds end-of-test state printout to help check whether RCU
shut down nicely. Note that this printout only helps for flavors of
RCU that are not used much by the kernel. In particular, for normal
RCU having a grace period in progress is expected behavior.
Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
Tested-by: Nicholas Piggin <npiggin@xxxxxxxxx>
---
kernel/rcu/rcutorture.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c
index 680c96d8c00f..fd86965b33a7 100644
--- a/kernel/rcu/rcutorture.c
+++ b/kernel/rcu/rcutorture.c
@@ -1609,6 +1609,9 @@ static enum cpuhp_state rcutor_hp;
static void
rcu_torture_cleanup(void)
{
+ int flags = 0;
+ unsigned long gpnum = 0;
+ unsigned long completed = 0;
int i;
rcutorture_record_test_transition();
@@ -1639,6 +1642,11 @@ rcu_torture_cleanup(void)
fakewriter_tasks = NULL;
}
+ rcutorture_get_gp_data(cur_ops->ttype, &flags, &gpnum, &completed);
+ srcutorture_get_gp_data(cur_ops->ttype, srcu_ctlp,
+ &flags, &gpnum, &completed);
+ pr_alert("%s: End-test grace-period state: g%lu c%lu f%#x\n",
+ cur_ops->name, gpnum, completed, flags);
torture_stop_kthread(rcu_torture_stats, stats_task);
torture_stop_kthread(rcu_torture_fqs, fqs_task);
for (i = 0; i < ncbflooders; i++)
--
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