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authorPaul E. McKenney <paulmck@linux.ibm.com>2019-04-12 09:02:46 -0700
committerPaul E. McKenney <paulmck@linux.ibm.com>2019-05-28 09:06:09 -0700
commit5eabea594b4ce9ba0fbd8618bd3bf01aa9f48af7 (patch)
tree9a2ce017ed6f5b30885755495f8d17d515c730b7 /kernel
parent2456a8562b296453b4cdce8b6928e3f91e39fefc (diff)
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rcutorture: Exempt tasks RCU from timely draining of grace periods
After the end of each stutter pause interval, the rcu_torture_writer() kthread checks to be sure that all prior callbacks have completed so that all the test structures have been freed. This works fine except for tasks RCU, in which grace periods can take one good long time. This commit therefore exempts tasks RCU from this check. Signed-off-by: Paul E. McKenney <paulmck@linux.ibm.com>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/rcu/rcutorture.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c
index a16d6abe1715..6a4558532eac 100644
--- a/kernel/rcu/rcutorture.c
+++ b/kernel/rcu/rcutorture.c
@@ -299,6 +299,7 @@ struct rcu_torture_ops {
int irq_capable;
int can_boost;
int extendables;
+ int slow_gps;
const char *name;
};
@@ -667,6 +668,7 @@ static struct rcu_torture_ops tasks_ops = {
.fqs = NULL,
.stats = NULL,
.irq_capable = 1,
+ .slow_gps = 1,
.name = "tasks"
};
@@ -1011,7 +1013,8 @@ rcu_torture_writer(void *arg)
}
rcu_torture_writer_state = RTWS_STUTTER;
if (stutter_wait("rcu_torture_writer") &&
- !READ_ONCE(rcu_fwd_cb_nodelay))
+ !READ_ONCE(rcu_fwd_cb_nodelay) &&
+ !cur_ops->slow_gps)
for (i = 0; i < ARRAY_SIZE(rcu_tortures); i++)
if (list_empty(&rcu_tortures[i].rtort_free) &&
rcu_access_pointer(rcu_torture_current) !=