Re: [PATCH 4/4] nohz: New option to force all CPUs in full dynticksrange

From: Paul E. McKenney
Date: Thu Apr 11 2013 - 13:16:21 EST


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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