linux-kernel - Re: [PATCH 2/2] nohz: make nohz

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Message-ID: <20150405050537.GA26390@gmail.com>
Date:	Sun, 5 Apr 2015 07:05:37 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	Chris Metcalf <cmetcalf@...hip.com>
Cc:	Rik van Riel <riel@...hat.com>,
	Mike Galbraith <umgwanakikbuti@...il.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	"Peter Zijlstra (Intel)" <peterz@...radead.org>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] nohz: make nohz_full imply isolcpus


* Chris Metcalf <cmetcalf@...hip.com> wrote:

> On 4/4/2015 10:10 AM, Rik van Riel wrote:
> >>Rik, what's the change you're proposing that's similar to this one? Thanks!
> >I don't have this particular one, and I like it.
> >
> >I know there are use cases where isolcpus= without
> >nohz_full= makes sense, but I cannot think of the
> >reverse.
> >
> >Acked-by: Rik van Riel<riel@...hat.com>
> 
> Thanks, I'll push it via the tile tree unless someone would prefer otherwise.

Yes, I'd prefer otherwise: please send the final, agreed upon patch to 
the timer tree.

> (The tick_nohz_full_set_cpus() and tick_nohz_full_clear_cpus() 
> routines are in earlier tile tree commits, the latter supporting a 
> change to the tile network driver.)

This is absolutely not OK, please push this through the timer tree. We 
don't do generic timer changes through architecture trees.

Thanks,

	Ingo
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