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From: "Paul E. McKenney" <paulmck@linux.ibm.com>
To: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: linux-kernel@vger.kernel.org,
	Josh Triplett <josh@joshtriplett.org>,
	Steven Rostedt <rostedt@goodmis.org>,
	Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
	Lai Jiangshan <jiangshanlai@gmail.com>,
	Joel Fernandes <joel@joelfernandes.org>,
	tglx@linutronix.de, Mike Galbraith <efault@gmx.de>
Subject: Re: [PATCH v2] rcu: Allow to eliminate softirq processing from rcutree
Date: Tue, 19 Mar 2019 09:50:07 -0700	[thread overview]
Message-ID: <20190319165007.GB4102@linux.ibm.com> (raw)
In-Reply-To: <20190319162431.4w2dqtssqkx6t4pq@linutronix.de>

On Tue, Mar 19, 2019 at 05:24:31PM +0100, Sebastian Andrzej Siewior wrote:
> On 2019-03-19 08:59:23 [-0700], Paul E. McKenney wrote:
> > I doubt that there is any code left from my original, so I set you as
> > author.  
> 
> I always forward ported it the patch over the years. So if it is no
> longer what it was once so be it. 

Besides, it looks very weird for me to have two Signed-off-by lines.  ;-)

> > I queued this and am starting tests without setting rcunosoftirq,
> > and will run more later setting it, courtesy of --bootargs.
> 
> oki.
> 
> > Steve Rostedt did raise a good question about adding event tracing to
> > the park functions.  I haven't really settled on an answer yet.  Thoughts?
> 
> It should trigger CPU hotplug events. If there was something similar for
> the softirq processing then the threaded processing should also have it.
> Please tell me which one should be added and I'm happy to add one.

In theory, the trace_rcu_utilization() should be added, just like at
the beginning and end of the function rcu_core(), but as far as I know,
no one uses that, so I actually have it on my list to remove.

							Thanx, Paul


  reply	other threads:[~2019-03-19 16:49 UTC|newest]

Thread overview: 44+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-03-15 11:11 [PATCH] rcu: Allow to eliminate softirq processing from rcutree Sebastian Andrzej Siewior
2019-03-15 13:35 ` Steven Rostedt
2019-03-15 13:57   ` Sebastian Andrzej Siewior
2019-03-18  2:24 ` Paul E. McKenney
2019-03-19 11:44   ` [PATCH v2] " Sebastian Andrzej Siewior
2019-03-19 15:59     ` Paul E. McKenney
2019-03-19 16:24       ` Sebastian Andrzej Siewior
2019-03-19 16:50         ` Paul E. McKenney [this message]
2019-03-19 17:02           ` Sebastian Andrzej Siewior
2019-03-20 11:32     ` Sebastian Andrzej Siewior
2019-03-20 15:21       ` Paul E. McKenney
2019-03-20 15:44         ` Paul E. McKenney
2019-03-20 16:05           ` Sebastian Andrzej Siewior
2019-03-20 16:15             ` Paul E. McKenney
2019-03-20 16:35               ` Sebastian Andrzej Siewior
2019-03-20 17:30                 ` Paul E. McKenney
2019-03-20 17:59                   ` Sebastian Andrzej Siewior
2019-03-20 18:12                     ` Paul E. McKenney
2019-03-20 18:14                       ` Sebastian Andrzej Siewior
2019-03-20 21:13                         ` [PATCH v3] " Sebastian Andrzej Siewior
2019-03-20 23:46                           ` Paul E. McKenney
2019-03-21  8:27                             ` Sebastian Andrzej Siewior
2019-03-21 13:26                               ` Paul E. McKenney
2019-03-21 23:32                             ` Paul E. McKenney
2019-03-22  7:35                               ` Paul E. McKenney
2019-03-22 12:43                                 ` Paul E. McKenney
2019-03-22 13:42                               ` Joel Fernandes
2019-03-22 14:58                                 ` Paul E. McKenney
2019-03-22 15:50                                   ` Joel Fernandes
2019-03-22 16:26                                     ` Paul E. McKenney
2019-03-22 18:07                                       ` Paul E. McKenney
2019-03-22 23:48                           ` Joel Fernandes
2019-03-23  0:25                             ` Paul E. McKenney
2019-03-23  1:04                               ` Joel Fernandes
2019-03-23 16:10                               ` Paul E. McKenney
2019-03-24 23:42                                 ` Paul E. McKenney
2019-03-25 13:41                                   ` Joel Fernandes
2019-03-25 15:08                                     ` Paul E. McKenney
2019-03-25 15:52                                       ` Paul E. McKenney
2019-03-20  0:26 ` [PATCH] " Joel Fernandes
2019-03-20 11:28   ` Sebastian Andrzej Siewior
2019-03-21 12:06     ` Joel Fernandes
2019-03-21 13:52       ` Paul E. McKenney
2019-03-20 15:24   ` Paul E. McKenney

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