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Date: Mon, 12 Oct 2015 19:50:29 +0200
From: Frederic Weisbecker <fweisbec@gmail.com>
To: Christoph Lameter <cl@linux.com>
Cc: Chris Metcalf <cmetcalf@ezchip.com>, paulmck@linux.vnet.ibm.com,
        Ingo Molnar <mingo@kernel.org>, LKML <linux-kernel@vger.kernel.org>,
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        Dave Jones <davej@redhat.com>, Thomas Gleixner <tglx@linutronix.de>,
        Oleg Nesterov <oleg@redhat.com>, Alexey Dobriyan <adobriyan@gmail.com>,
        Rik van Riel <riel@redhat.com>,
        Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH] nohz: Revert "nohz: Set isolcpus when nohz_full is set"
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On Mon, Oct 12, 2015 at 12:45:08PM -0500, Christoph Lameter wrote:
> On Mon, 12 Oct 2015, Frederic Weisbecker wrote:
> 
> > But yeah if you guys want to create a new parameter that gathers nohz
> > and isolcpus I think we can.
> 
> Could we also add the rcu settings?

Yeah, those are implied by nohz_full anyway.

Now nohz_full shouldn't imply anything else than nohz but I'm not sure
I can change that. Kernel parameters are ABIs of some sort.

Ideally we should have something like cpu_isolation= which implies everything.

> 
> > task_isolation is really just about tasks so it should be another name.
> 
> no_os_cpus?
>
> os_free_cpus?

No, we can still do syscalls :-)

But noise_free_cpus= ?