linux-kernel - Re: [PATCH 06/32] nohz: Move idle ticks stats tracking out of nohz handlers

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Message-ID: <1314628088.2816.68.camel@twins>
Date:	Mon, 29 Aug 2011 16:28:08 +0200
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Frederic Weisbecker <fweisbec@...il.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Anton Blanchard <anton@....ibm.com>,
	Avi Kivity <avi@...hat.com>, Ingo Molnar <mingo@...e.hu>,
	Lai Jiangshan <laijs@...fujitsu.com>,
	"Paul E . McKenney" <paulmck@...ux.vnet.ibm.com>,
	Paul Menage <menage@...gle.com>,
	Stephen Hemminger <shemminger@...tta.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Tim Pepper <lnxninja@...ux.vnet.ibm.com>
Subject: Re: [PATCH 06/32] nohz: Move idle ticks stats tracking out of nohz
 handlers

On Mon, 2011-08-15 at 17:52 +0200, Frederic Weisbecker wrote:
> Idle ticks time tracking is merged into nohz stop/restart
> handlers. Pull it out into idle entry/exit handlers instead,
> so that nohz APIs is more idle independant. 

Are you trying to say:

Currently idle time tracking is part of the nohz state tracking,
separate this so that we can disable the tick while we're non-idle?

If so, how does idle time tracking work on a !NOHZ kernel, surely such
things can be idle too..
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