From: Steven Rostedt <rostedt@goodmis.org>
To: "Paul E. McKenney" <paulmck@kernel.org>
Cc: Joel Fernandes <joel@joelfernandes.org>,
Kalesh Singh <kaleshsingh@google.com>,
Suren Baghdasaryan <surenb@google.com>,
kernel-team <kernel-team@android.com>, Tejun Heo <tj@kernel.org>,
Tim Murray <timmurray@google.com>, Wei Wang <wvw@google.com>,
Kyle Lin <kylelin@google.com>, Chunwei Lu <chunweilu@google.com>,
Lulu Wang <luluw@google.com>,
Frederic Weisbecker <frederic@kernel.org>,
Neeraj Upadhyay <quic_neeraju@quicinc.com>,
Josh Triplett <josh@joshtriplett.org>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Lai Jiangshan <jiangshanlai@gmail.com>, rcu <rcu@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v2] EXP rcu: Move expedited grace period (GP) work to RT kthread_worker
Date: Fri, 8 Apr 2022 17:27:14 -0400 [thread overview]
Message-ID: <20220408172714.52d64c84@gandalf.local.home> (raw)
In-Reply-To: <20220408155834.GI4285@paulmck-ThinkPad-P17-Gen-1>
On Fri, 8 Apr 2022 08:58:34 -0700
"Paul E. McKenney" <paulmck@kernel.org> wrote:
> > I do not see why PREEMPT_RT is special here. Why was it singled out?
>
> Because I didn't see the point of doing kthread_create_worker() to create
> a pair of kthread_worker structuress that were never going to be used
> in PREEMPT_RT kernels.
>
> Or are PREEMPT_RT kernels no longer booting with rcupdate.rcu_normal?
> Last I knew, they all did this to avoid IPI latencies from expedited
> grace periods. Has this changed?
Honestly, I don't know. But I guess I can go and find out ;-)
-- Steve
next prev parent reply other threads:[~2022-04-08 21:27 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-08 4:57 [PATCH v2] EXP rcu: Move expedited grace period (GP) work to RT kthread_worker Kalesh Singh
2022-04-08 10:21 ` Joel Fernandes
2022-04-08 15:25 ` Paul E. McKenney
2022-04-08 15:39 ` Steven Rostedt
2022-04-08 15:58 ` Paul E. McKenney
2022-04-08 21:27 ` Steven Rostedt [this message]
2022-04-08 10:42 ` Joel Fernandes
2022-04-08 14:34 ` Paul E. McKenney
2022-04-08 14:41 ` Joel Fernandes
2022-04-08 15:34 ` Paul E. McKenney
2022-04-08 17:14 ` Joel Fernandes
2022-04-08 17:39 ` Paul E. McKenney
2022-04-08 17:53 ` Kalesh Singh
2022-04-08 21:42 ` Steven Rostedt
2022-04-08 22:06 ` Kalesh Singh
[not found] ` <20220409071740.6024-1-hdanton@sina.com>
2022-04-09 15:56 ` Paul E. McKenney
[not found] ` <20220413113711.1263-1-hdanton@sina.com>
2022-04-13 14:07 ` Paul E. McKenney
2022-04-13 17:21 ` Joel Fernandes
2022-04-13 18:07 ` Paul E. McKenney
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