Date: Fri, 2 Nov 2012 13:41:57 -0700
From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
To: Christoph Lameter <cl@linux.com>
Cc: Steven Rostedt <rostedt@goodmis.org>, linux-kernel@vger.kernel.org,
        Andrew Morton <akpm@linux-foundation.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Peter Zijlstra <peterz@infradead.org>,
        Clark Williams <clark.williams@gmail.com>,
        Frederic Weisbecker <fweisbec@gmail.com>,
        Li Zefan <lizf@cn.fujitsu.com>, Ingo Molnar <mingo@kernel.org>,
        Mike Galbraith <efault@gmx.de>
Subject: Re: [PATCH 00/32] [RFC] nohz/cpuset: Start discussions on nohz CPUs
Message-ID: <20121102204157.GE3027@linux.vnet.ibm.com>
Reply-To: paulmck@linux.vnet.ibm.com
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On Fri, Nov 02, 2012 at 08:16:58PM +0000, Christoph Lameter wrote:
> On Fri, 2 Nov 2012, Paul E. McKenney wrote:
> 
> > So I believe that these need to be controlled separately for the immediate
> > future.
> 
> Yes they do but the configurations are similar and it would be best if
> these were cpumasks in standard locations instead of being specified at
> boot time or in a cpuset.
> 
> Put the cpu masks into
> 
> /sys/devices/system/cpu/{nohz_cpus,rcu_cpus}
> 
> or so?

The no-CBs mask would be read-only for some time -- changed only at
boot.  Longer term, I hope to allow run-time modification, but...

							Thanx, Paul

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