Date: Thu, 11 Apr 2013 10:11:53 -0700
From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
To: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Christoph Lameter <cl@linux.com>, Ingo Molnar <mingo@kernel.org>,
        LKML <linux-kernel@vger.kernel.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Chris Metcalf <cmetcalf@tilera.com>,
        Geoff Levand <geoff@infradead.org>,
        Gilad Ben Yossef <gilad@benyossef.com>,
        Hakan Akkan <hakanakkan@gmail.com>, Kevin Hilman <khilman@linaro.org>,
        Li Zhong <zhong@linux.vnet.ibm.com>,
        Namhyung Kim <namhyung.kim@lge.com>,
        Paul Gortmaker <paul.gortmaker@windriver.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Steven Rostedt <rostedt@goodmis.org>,
        Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [PATCH 4/4] nohz: New option to force all CPUs in full dynticks
 range
Message-ID: <20130411171153.GG29861@linux.vnet.ibm.com>
Reply-To: paulmck@linux.vnet.ibm.com
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On Thu, Apr 11, 2013 at 07:04:23PM +0200, Frederic Weisbecker wrote:
> On Thu, Apr 11, 2013 at 04:41:07PM +0000, Christoph Lameter wrote:
> > On Thu, 11 Apr 2013, Frederic Weisbecker wrote:
> > 
> > > If there is no performance issue with that I'm all for it.
> > 
> > Or have a
> > 
> > CONFIG_LOWLATENCY
> > 
> > that boots up a kernel with the proper configuration?
> 
> It may be too general for a naming. But I don't mind just
> selecting CONFIG_RCU_NOCBS_ALL unconditionally. It's easily
> changed in the future if anybody complains.
> 
> Btw, if CONFIG_RCU_NOCBS_ALL is set, the rcu_nocbs= parameter
> is ignored, right? If you want to keep that direction and not
> override the Kconfig choice, may be warn the user about that
> if the boot parameter is passed?

Fair point.  Let me think about how I should approach this.

							Thanx, Paul

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