diff options
| author | Paul E. McKenney <paulmck@kernel.org> | 2022-02-04 12:45:18 -0800 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2022-04-11 17:07:28 -0700 |
| commit | 99d6a2acb8955f12489bfba04f2db22bc0b57726 (patch) | |
| tree | 8406975fc059e6fe639ecd16465658bdd6a97bbf /kernel/rcu/rcutorture.c | |
| parent | b6f3c6a2b1fe2d754acb7bf64a20e64a8f2c8a1b (diff) | |
rcutorture: Suppress debugging grace period delays during flooding
Tree RCU supports grace-period delays using the rcutree.gp_cleanup_delay,
rcutree.gp_init_delay, and rcutree.gp_preinit_delay kernel boot
parameters. These delays are strictly for debugging purposes, and have
proven quite effective at exposing bugs involving race with CPU-hotplug
operations. However, these delays can result in false positives when
used in conjunction with callback flooding, for example, those generated
by the rcutorture.fwd_progress kernel boot parameter.
This commit therefore suppresses grace-period delays while callback
flooding is in progress.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'kernel/rcu/rcutorture.c')
| -rw-r--r-- | kernel/rcu/rcutorture.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c index 55d049c39608..f37b7a01dcd0 100644 --- a/kernel/rcu/rcutorture.c +++ b/kernel/rcu/rcutorture.c @@ -2916,10 +2916,12 @@ rcu_torture_cleanup(void) pr_info("%s: Invoking %pS().\n", __func__, cur_ops->cb_barrier); cur_ops->cb_barrier(); } + rcu_gp_slow_unregister(NULL); return; } if (!cur_ops) { torture_cleanup_end(); + rcu_gp_slow_unregister(NULL); return; } @@ -3016,6 +3018,7 @@ rcu_torture_cleanup(void) else rcu_torture_print_module_parms(cur_ops, "End of test: SUCCESS"); torture_cleanup_end(); + rcu_gp_slow_unregister(&rcu_fwd_cb_nodelay); } #ifdef CONFIG_DEBUG_OBJECTS_RCU_HEAD @@ -3320,6 +3323,7 @@ rcu_torture_init(void) if (object_debug) rcu_test_debug_objects(); torture_init_end(); + rcu_gp_slow_register(&rcu_fwd_cb_nodelay); return 0; unwind: |