linux-kernel - Re: [PATCH 07/32] cpuset: Set up interface for nohz flag

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Message-ID: <1332851466.7679.32.camel@marge.simpson.net>
Date:	Tue, 27 Mar 2012 14:31:06 +0200
From:	Mike Galbraith <efault@....de>
To:	Frederic Weisbecker <fweisbec@...il.com>
Cc:	Christoph Lameter <cl@...ux.com>,
	LKML <linux-kernel@...r.kernel.org>,
	linaro-sched-sig@...ts.linaro.org,
	Alessio Igor Bogani <abogani@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Avi Kivity <avi@...hat.com>,
	Chris Metcalf <cmetcalf@...era.com>,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	Geoff Levand <geoff@...radead.org>,
	Gilad Ben Yossef <gilad@...yossef.com>,
	Ingo Molnar <mingo@...nel.org>,
	Max Krasnyansky <maxk@...lcomm.com>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Stephen Hemminger <shemminger@...tta.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Sven-Thorsten Dietrich <thebigcorporation@...il.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Zen Lin <zen@...nhuawei.org>
Subject: Re: [PATCH 07/32] cpuset: Set up interface for nohz flag

On Tue, 2012-03-27 at 13:56 +0200, Frederic Weisbecker wrote: 
> Ok but there is a difference between idle nohz and busy nohz.
> Idle nohz may let the CPU enter into low power mode. busy nohz
> (implemented by this patchset) doesn't because it stops the tick
> when the CPU runs.

Yeah.  Your set is tagged important here (stare at, and play with;).

-Mike

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