linux-kernel - Re: [PATCH v2] rcu: Allow to eliminate softirq processing from rcutree

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Message-ID: <20190319162431.4w2dqtssqkx6t4pq@linutronix.de>
Date:   Tue, 19 Mar 2019 17:24:31 +0100
From:   Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:     "Paul E. McKenney" <paulmck@...ux.ibm.com>
Cc:     linux-kernel@...r.kernel.org,
        Josh Triplett <josh@...htriplett.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        Lai Jiangshan <jiangshanlai@...il.com>,
        Joel Fernandes <joel@...lfernandes.org>, tglx@...utronix.de,
        Mike Galbraith <efault@....de>
Subject: Re: [PATCH v2] rcu: Allow to eliminate softirq processing from
 rcutree

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. 

> 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.

> 							Thanx, Paul
> 

Sebastian