rcutorture: Enable limited callback-flooding tests of SRCU

This commit allows up to 50,000 callbacks worth of callback-flooding
tests of SRCU.  The goal of this change is to exercise Tree SRCU's
ability to transition from SRCU_SIZE_SMALL to SRCU_SIZE_BIG triggered
by callback-queue-time lock contention.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c
index 1c8f40b..b41db71 100644 (file)
--- a/kernel/rcu/rcutorture.c
+++ b/kernel/rcu/rcutorture.c
@@ -674,6 +674,7 @@ static struct rcu_torture_ops srcu_ops = {
        .call           = srcu_torture_call,
        .cb_barrier     = srcu_torture_barrier,
        .stats          = srcu_torture_stats,
+       .cbflood_max    = 50000,
        .irq_capable    = 1,
        .no_pi_lock     = IS_ENABLED(CONFIG_TINY_SRCU),
        .name           = "srcu"
@@ -708,6 +709,7 @@ static struct rcu_torture_ops srcud_ops = {
        .call           = srcu_torture_call,
        .cb_barrier     = srcu_torture_barrier,
        .stats          = srcu_torture_stats,
+       .cbflood_max    = 50000,
        .irq_capable    = 1,
        .no_pi_lock     = IS_ENABLED(CONFIG_TINY_SRCU),
        .name           = "srcud"