Date: Thu, 11 Apr 2013 17:53:53 +0200
From: Frederic Weisbecker <fweisbec@gmail.com>
To: "Paul E. McKenney" <paulmck@linux.vnet.ibm.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: <20130411155349.GA16797@somewhere.redhat.com>
References: <1364398359-21990-1-git-send-email-fweisbec@gmail.com>
 <1364398359-21990-5-git-send-email-fweisbec@gmail.com>
 <20130328074507.GC24433@gmail.com>
 <CAFTL4hzQfodVP4O+nir1XwQ2QkUUqrfr_dBpWL0635f0u4oRBA@mail.gmail.com>
 <20130330091037.GA31743@gmail.com>
 <0000013dea26b171-8095c339-dc81-4459-a3ad-a8d69c803448-000000@email.amazonses.com>
 <20130411151956.GF15699@somewhere>
 <20130411153721.GA3742@linux.vnet.ibm.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20130411153721.GA3742@linux.vnet.ibm.com>
User-Agent: Mutt/1.5.21 (2010-09-15)
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 871
Lines: 19

On Thu, Apr 11, 2013 at 08:37:21AM -0700, Paul E. McKenney wrote:
> On Thu, Apr 11, 2013 at 05:19:59PM +0200, Frederic Weisbecker wrote:
> > On Mon, Apr 08, 2013 at 02:57:18PM +0000, Christoph Lameter wrote:
> > > I think we could simplify things quite a bit if we either
> > > 
> > > 1. Add any cpus specified with nohz_full/extended=xxx to
> > > rcu_nocb. No check is then necessary anymore.
> > 
> > Yeah in the long term we probably want that indeed.
> 
> Or just build with RCU_NOCB_CPU_ALL=y to unconditionally offload all
> the CPUs when using nohz_extended.

If there is no performance issue with that I'm all for it.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/