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Message-Id: <20221220141625.3612085-1-qiang1.zhang@intel.com>
Date: Tue, 20 Dec 2022 22:16:25 +0800
From: Zqiang <qiang1.zhang@...el.com>
To: paulmck@...nel.org, frederic@...nel.org, quic_neeraju@...cinc.com,
joel@...lfernandes.org
Cc: rcu@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] rcu: Fix missing TICK_DEP_MASK_RCU_EXP dependency check
This commit add TICK_DEP_MASK_RCU_EXP dependency check in
check_tick_dependency(), fix commit df1e849ae4559 ("rcu: Enable
tick for nohz_full CPUs slow to provide expedited QS").
Signed-off-by: Zqiang <qiang1.zhang@...el.com>
---
include/trace/events/timer.h | 3 ++-
kernel/time/tick-sched.c | 5 +++++
2 files changed, 7 insertions(+), 1 deletion(-)
diff --git a/include/trace/events/timer.h b/include/trace/events/timer.h
index 2e713a7d9aa3..3e8619c72f77 100644
--- a/include/trace/events/timer.h
+++ b/include/trace/events/timer.h
@@ -371,7 +371,8 @@ TRACE_EVENT(itimer_expire,
tick_dep_name(PERF_EVENTS) \
tick_dep_name(SCHED) \
tick_dep_name(CLOCK_UNSTABLE) \
- tick_dep_name_end(RCU)
+ tick_dep_name(RCU) \
+ tick_dep_name_end(RCU_EXP)
#undef tick_dep_name
#undef tick_dep_mask_name
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index b0e3c9205946..ba2ac1469d47 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -281,6 +281,11 @@ static bool check_tick_dependency(atomic_t *dep)
return true;
}
+ if (val & TICK_DEP_MASK_RCU_EXP) {
+ trace_tick_stop(0, TICK_DEP_MASK_RCU_EXP);
+ return true;
+ }
+
return false;
}
--
2.25.1
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