diff options
Diffstat (limited to 'kernel/rcu')
| -rw-r--r-- | kernel/rcu/tasks.h | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/kernel/rcu/tasks.h b/kernel/rcu/tasks.h index 17b1b9a31071..4857450c0430 100644 --- a/kernel/rcu/tasks.h +++ b/kernel/rcu/tasks.h @@ -30,6 +30,8 @@ typedef void (*postgp_func_t)(struct rcu_tasks *rtp); * @gp_state: Grace period's most recent state transition (debugging). * @gp_jiffies: Time of last @gp_state transition. * @gp_start: Most recent grace-period start in jiffies. + * @n_gps: Number of grace periods completed since boot. + * @n_ipis: Number of IPIs sent to encourage grace periods to end. * @pregp_func: This flavor's pre-grace-period function (optional). * @pertask_func: This flavor's per-task scan function (optional). * @postscan_func: This flavor's post-task scan function (optional). @@ -47,6 +49,8 @@ struct rcu_tasks { int gp_state; unsigned long gp_jiffies; unsigned long gp_start; + unsigned long n_gps; + unsigned long n_ipis; struct task_struct *kthread_ptr; rcu_tasks_gp_func_t gp_func; pregp_func_t pregp_func; @@ -208,6 +212,7 @@ static int __noreturn rcu_tasks_kthread(void *arg) set_tasks_gp_state(rtp, RTGS_WAIT_GP); rtp->gp_start = jiffies; rtp->gp_func(rtp); + rtp->n_gps++; /* Invoke the callbacks. */ set_tasks_gp_state(rtp, RTGS_INVOKE_CBS); @@ -285,11 +290,12 @@ static void __init rcu_tasks_bootup_oddness(void) /* Dump out rcutorture-relevant state common to all RCU-tasks flavors. */ static void show_rcu_tasks_generic_gp_kthread(struct rcu_tasks *rtp, char *s) { - pr_info("%s: %s(%d) since %lu %c%c %s\n", + pr_info("%s: %s(%d) since %lu g:%lu i:%lu %c%c %s\n", rtp->kname, tasks_gp_state_getname(rtp), data_race(rtp->gp_state), jiffies - data_race(rtp->gp_jiffies), + data_race(rtp->n_gps), data_race(rtp->n_ipis), ".k"[!!data_race(rtp->kthread_ptr)], ".C"[!!data_race(rtp->cbs_head)], s); @@ -592,6 +598,7 @@ static void rcu_tasks_be_rude(struct work_struct *work) // Wait for one rude RCU-tasks grace period. static void rcu_tasks_rude_wait_gp(struct rcu_tasks *rtp) { + rtp->n_ipis += cpumask_weight(cpu_online_mask); schedule_on_each_cpu(rcu_tasks_be_rude); } @@ -856,6 +863,7 @@ static void trc_wait_for_one_reader(struct task_struct *t, atomic_inc(&trc_n_readers_need_end); per_cpu(trc_ipi_to_cpu, cpu) = true; t->trc_ipi_to_cpu = cpu; + rcu_tasks_trace.n_ipis++; if (smp_call_function_single(cpu, trc_read_check_handler, t, 0)) { // Just in case there is some other reason for |