[PATCH rcu 05/11] rcuscale: Print detailed grace-period and barrier diagnostics
From: Paul E. McKenney
Date: Thu Aug 01 2024 - 20:43:38 EST
This commit uses the new rcu_tasks_torture_stats_print(),
rcu_tasks_trace_torture_stats_print(), and
rcu_tasks_rude_torture_stats_print() functions in order to provide
detailed diagnostics on grace-period, callback, and barrier state when
rcu_scale_writer() hangs.
[ paulmck: Apply kernel test robot feedback. ]
Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxx>
---
kernel/rcu/rcuscale.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/kernel/rcu/rcuscale.c b/kernel/rcu/rcuscale.c
index ddfb96e5a4e1e..933014b381ec0 100644
--- a/kernel/rcu/rcuscale.c
+++ b/kernel/rcu/rcuscale.c
@@ -298,6 +298,11 @@ static void tasks_scale_read_unlock(int idx)
{
}
+static void rcu_tasks_scale_stats(void)
+{
+ rcu_tasks_torture_stats_print(scale_type, SCALE_FLAG);
+}
+
static struct rcu_scale_ops tasks_ops = {
.ptype = RCU_TASKS_FLAVOR,
.init = rcu_sync_scale_init,
@@ -310,6 +315,7 @@ static struct rcu_scale_ops tasks_ops = {
.sync = synchronize_rcu_tasks,
.exp_sync = synchronize_rcu_tasks,
.rso_gp_kthread = get_rcu_tasks_gp_kthread,
+ .stats = IS_ENABLED(CONFIG_TINY_RCU) ? NULL : rcu_tasks_scale_stats,
.name = "tasks"
};
@@ -336,6 +342,11 @@ static void tasks_rude_scale_read_unlock(int idx)
{
}
+static void rcu_tasks_rude_scale_stats(void)
+{
+ rcu_tasks_rude_torture_stats_print(scale_type, SCALE_FLAG);
+}
+
static struct rcu_scale_ops tasks_rude_ops = {
.ptype = RCU_TASKS_RUDE_FLAVOR,
.init = rcu_sync_scale_init,
@@ -346,6 +357,7 @@ static struct rcu_scale_ops tasks_rude_ops = {
.sync = synchronize_rcu_tasks_rude,
.exp_sync = synchronize_rcu_tasks_rude,
.rso_gp_kthread = get_rcu_tasks_rude_gp_kthread,
+ .stats = IS_ENABLED(CONFIG_TINY_RCU) ? NULL : rcu_tasks_rude_scale_stats,
.name = "tasks-rude"
};
@@ -374,6 +386,11 @@ static void tasks_trace_scale_read_unlock(int idx)
rcu_read_unlock_trace();
}
+static void rcu_tasks_trace_scale_stats(void)
+{
+ rcu_tasks_trace_torture_stats_print(scale_type, SCALE_FLAG);
+}
+
static struct rcu_scale_ops tasks_tracing_ops = {
.ptype = RCU_TASKS_FLAVOR,
.init = rcu_sync_scale_init,
@@ -386,6 +403,7 @@ static struct rcu_scale_ops tasks_tracing_ops = {
.sync = synchronize_rcu_tasks_trace,
.exp_sync = synchronize_rcu_tasks_trace,
.rso_gp_kthread = get_rcu_tasks_trace_gp_kthread,
+ .stats = IS_ENABLED(CONFIG_TINY_RCU) ? NULL : rcu_tasks_trace_scale_stats,
.name = "tasks-tracing"
};
--
2.40.1