From: "Paul E. McKenney" <paulmck@kernel.org>
To: rcu@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, kernel-team@meta.com,
rostedt@goodmis.org, "Paul E. McKenney" <paulmck@kernel.org>
Subject: [PATCH rcu 3/6] rcu: Provide rcu_barrier_cb_is_done() to check rcu_barrier() CBs
Date: Thu, 1 Aug 2024 17:34:23 -0700 [thread overview]
Message-ID: <20240802003426.4134196-3-paulmck@kernel.org> (raw)
In-Reply-To: <41c68c6b-2c55-4c2d-ab70-f2a5b38eb374@paulmck-laptop>
This commit provides a rcu_barrier_cb_is_done() function that returns
true if the *rcu_barrier*() callback passed in is done. This will be
used when printing grace-period debugging information.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
---
kernel/rcu/rcu.h | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/kernel/rcu/rcu.h b/kernel/rcu/rcu.h
index f035fd4e579b4..feb3ac1dc5d59 100644
--- a/kernel/rcu/rcu.h
+++ b/kernel/rcu/rcu.h
@@ -252,6 +252,11 @@ static inline void debug_rcu_head_callback(struct rcu_head *rhp)
kmem_dump_obj(rhp);
}
+static inline bool rcu_barrier_cb_is_done(struct rcu_head *rhp)
+{
+ return rhp->next == rhp;
+}
+
extern int rcu_cpu_stall_suppress_at_boot;
static inline bool rcu_stall_is_suppressed_at_boot(void)
--
2.40.1
next prev parent reply other threads:[~2024-08-02 0:34 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-08-02 0:34 [PATCH rcu 0/6] Add RCU Tasks diagnostics and documentation Paul E. McKenney
2024-08-02 0:34 ` [PATCH rcu 1/6] rcu/tasks: Check processor-ID assumptions Paul E. McKenney
2024-08-14 12:16 ` Neeraj Upadhyay
2024-08-14 16:13 ` Paul E. McKenney
2024-08-02 0:34 ` [PATCH rcu 2/6] rcu/tasks: Update rtp->tasks_gp_seq comment Paul E. McKenney
2024-08-02 0:34 ` Paul E. McKenney [this message]
2024-08-02 0:34 ` [PATCH rcu 4/6] rcu/tasks: Mark callbacks not currently participating in barrier operation Paul E. McKenney
2024-08-02 0:34 ` [PATCH rcu 5/6] rcu/tasks: Add detailed grace-period and barrier diagnostics Paul E. McKenney
2024-08-02 0:34 ` [PATCH rcu 6/6] rcu/tasks: Add rcu_barrier_tasks*() start time to diagnostics Paul E. McKenney
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