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Date:	Sun, 20 Jul 2014 22:34:17 +0200
From:	Peter Zijlstra <>
To:	"Paul E. McKenney" <>
Cc:	Frederic Weisbecker <>,,,,,,,,,,,,,,
Subject: Re: [PATCH tip/core/rcu] Do not keep timekeeping CPU tick running
 for non-nohz_full= CPUs

On Sun, Jul 20, 2014 at 04:47:59AM -0700, Paul E. McKenney wrote:
> So we really have to have -all- the CPUs be idle to turn off the timekeeper.

That seems to be pretty unavoidable any which way around.

> This won't make the battery-powered embedded guys happy...
> Other thoughts on this?  We really should not be setting
> CONFIG_NO_HZ_FULL_SYSIDLE by default until this is solved.

What are those same guys doing with nohz_full to begin with?

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