linux-kernel - Re: [PATCH 10/13] nohz: Hand over timekeeping duty on cpu offlining

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Message-ID: <20131218164330.GA19339@localhost.localdomain>
Date:	Wed, 18 Dec 2013 17:43:33 +0100
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...nel.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	John Stultz <john.stultz@...aro.org>,
	Alex Shi <alex.shi@...aro.org>,
	Kevin Hilman <khilman@...aro.org>
Subject: Re: [PATCH 10/13] nohz: Hand over timekeeping duty on cpu offlining

On Wed, Dec 18, 2013 at 01:30:01PM +0100, Peter Zijlstra wrote:
> On Tue, Dec 17, 2013 at 11:51:29PM +0100, Frederic Weisbecker wrote:
> > The default timekeeper (aka CPU 0) is the perfect candidate for this
> > task since it can't be offlined itself.
> 
> Like said previously, yes it can!

I'll rephrase that in the changelog to precise that it's the tick hotplug handler
which prevent it to offline.
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