If a callback flood prevents grace period from completing, rcutorture
does a WARN_ON(). Avoiding this WARN_ON() currently requires that at
least three grace periods elapse during an eight-second callback-flood
interval. Unfortunately, the current debug information does not include
anything about the grace-period state. This commit therefore adds a
call to cur_ops->gp_kthread_dbg(), if this function pointer is non-NULL.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
if (!torture_must_stop() && !READ_ONCE(rcu_fwd_emergency_stop) &&
!shutdown_time_arrived()) {
- WARN_ON(n_max_gps < MIN_FWD_CBS_LAUNDERED);
+ if (WARN_ON(n_max_gps < MIN_FWD_CBS_LAUNDERED) && cur_ops->gp_kthread_dbg)
+ cur_ops->gp_kthread_dbg();
pr_alert("%s Duration %lu barrier: %lu pending %ld n_launders: %ld n_launders_sa: %ld n_max_gps: %ld n_max_cbs: %ld cver %ld gps %ld #online %u\n",
__func__,
stoppedat - rfp->rcu_fwd_startat, jiffies - stoppedat,