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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2018-04-19 08:43:11 -0700
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2018-05-15 10:32:08 -0700
commit034777d7f5c6bc5326184ffa63b7a840ef0e9759 (patch)
tree04ea165045c633c28db81b2ff15b4765affb8efa /kernel/rcu
parentd600e06ba73034da215191a90002296a41eb0cf1 (diff)
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@linux.vnet.ibm.com> Tested-by: Nicholas Piggin <npiggin@gmail.com>
Diffstat (limited to 'kernel/rcu')
-rw-r--r--kernel/rcu/rcutorture.c8
1 files changed, 8 insertions, 0 deletions
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++)