From: "Paul E. McKenney" <paulmck@kernel.org>
To: rcu@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, kernel-team@fb.com,
mingo@kernel.org, jiangshanlai@gmail.com,
akpm@linux-foundation.org, mathieu.desnoyers@efficios.com,
josh@joshtriplett.org, tglx@linutronix.de, peterz@infradead.org,
rostedt@goodmis.org, dhowells@redhat.com, edumazet@google.com,
fweisbec@gmail.com, oleg@redhat.com, joel@joelfernandes.org,
"Paul E. McKenney" <paulmck@kernel.org>
Subject: [PATCH tip/core/rcu 13/19] rcu: Make rcu_gp_cleanup() be noinline for tracing
Date: Tue, 11 May 2021 15:52:58 -0700 [thread overview]
Message-ID: <20210511225304.2893154-13-paulmck@kernel.org> (raw)
In-Reply-To: <20210511225241.GA2893003@paulmck-ThinkPad-P17-Gen-1>
Although there are trace events for RCU grace periods, these are only
enabled in CONFIG_RCU_TRACE=y kernels. This commit therefore marks
rcu_gp_cleanup() noinline in order to provide a function that can be
traced that is invoked near the end of each grace period.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
---
kernel/rcu/tree.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index 00a3ebca70b8..6eb64e44bdcd 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -2026,7 +2026,7 @@ static void rcu_gp_fqs_loop(void)
/*
* Clean up after the old grace period.
*/
-static void rcu_gp_cleanup(void)
+static noinline void rcu_gp_cleanup(void)
{
int cpu;
bool needgp = false;
--
2.31.1.189.g2e36527f23
next prev parent reply other threads:[~2021-05-11 22:53 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-11 22:52 [PATCH tip/core/rcu 0/19] Miscellaneous fixes for v5.14 Paul E. McKenney
2021-05-11 22:52 ` [PATCH tip/core/rcu 01/19] rcu: Fix typo in comment: kthead -> kthread Paul E. McKenney
2021-05-11 22:52 ` [PATCH tip/core/rcu 02/19] rcu: Remove the unused rcu_irq_exit_preempt() function Paul E. McKenney
2021-05-11 22:52 ` [PATCH tip/core/rcu 03/19] rcu: Improve tree.c comments and add code cleanups Paul E. McKenney
2021-05-11 22:52 ` [PATCH tip/core/rcu 04/19] rcu: Invoke rcu_spawn_core_kthreads() from rcu_spawn_gp_kthread() Paul E. McKenney
2021-05-11 22:52 ` [PATCH tip/core/rcu 05/19] rcu: Add ->rt_priority and ->gp_start to show_rcu_gp_kthreads() output Paul E. McKenney
2021-05-11 22:52 ` [PATCH tip/core/rcu 06/19] rcu: Add ->gp_max " Paul E. McKenney
2021-05-11 22:52 ` [PATCH tip/core/rcu 07/19] lockdep: Explicitly flag likely false-positive report Paul E. McKenney
2021-05-11 22:52 ` [PATCH tip/core/rcu 08/19] rcu: Reject RCU_LOCKDEP_WARN() false positives Paul E. McKenney
2021-05-11 22:52 ` [PATCH tip/core/rcu 09/19] rcu: Add quiescent states and boost states to show_rcu_gp_kthreads() output Paul E. McKenney
2021-05-11 22:52 ` [PATCH tip/core/rcu 10/19] rcu: Make RCU priority boosting work on single-CPU rcu_node structures Paul E. McKenney
2021-05-11 22:52 ` [PATCH tip/core/rcu 11/19] rcu: Make show_rcu_gp_kthreads() dump rcu_node structures blocking GP Paul E. McKenney
2021-05-11 22:52 ` [PATCH tip/core/rcu 12/19] rcu: Restrict RCU_STRICT_GRACE_PERIOD to at most four CPUs Paul E. McKenney
2021-05-11 22:52 ` Paul E. McKenney [this message]
2021-05-11 22:52 ` [PATCH tip/core/rcu 14/19] rcu: Point to documentation of ordering guarantees Paul E. McKenney
2021-05-11 22:53 ` [PATCH tip/core/rcu 15/19] rcu: Create an unrcu_pointer() to remove __rcu from a pointer Paul E. McKenney
2021-05-11 22:53 ` [PATCH tip/core/rcu 16/19] sched/isolation: reconcile rcu_nocbs= and nohz_full= Paul E. McKenney
2021-05-11 22:53 ` [PATCH tip/core/rcu 17/19] rcu: Improve comments describing RCU read-side critical sections Paul E. McKenney
2021-05-11 22:53 ` [PATCH tip/core/rcu 18/19] rcu: Remove obsolete rcu_read_unlock() deadlock commentary Paul E. McKenney
2021-05-11 22:53 ` [PATCH tip/core/rcu 19/19] rcu: Add missing __releases() annotation Paul E. McKenney
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