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Message-Id: <20240816070256.60993-7-neeraj.upadhyay@kernel.org>
Date: Fri, 16 Aug 2024 12:32:49 +0530
From: neeraj.upadhyay@...nel.org
To: rcu@...r.kernel.org
Cc: linux-kernel@...r.kernel.org,
kernel-team@...a.com,
rostedt@...dmis.org,
paulmck@...nel.org,
neeraj.upadhyay@...nel.org,
neeraj.upadhyay@....com,
boqun.feng@...il.com,
joel@...lfernandes.org,
urezki@...il.com,
frederic@...nel.org
Subject: [PATCH rcu 07/14] rcuscale: Print detailed grace-period and barrier diagnostics
From: "Paul E. McKenney" <paulmck@...nel.org>
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@...nel.org>
Signed-off-by: Neeraj Upadhyay <neeraj.upadhyay@...nel.org>
---
kernel/rcu/rcuscale.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/kernel/rcu/rcuscale.c b/kernel/rcu/rcuscale.c
index 1b9a43653d7e..c507750e94d8 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
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