linux-kernel - Re: [RFC patch 0/5] hrtimers: Add deferrable mode

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Message-ID: <530D5935.9010104@mit.edu>
Date:	Tue, 25 Feb 2014 19:02:13 -0800
From:	Andy Lutomirski <luto@...capital.net>
To:	Thomas Gleixner <tglx@...utronix.de>,
	LKML <linux-kernel@...r.kernel.org>
CC:	John Stultz <john.stultz@...aro.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Anton Vorontsov <anton@...msg.org>,
	Alexey Perevalov <a.perevalov@...sung.com>,
	kyungmin.park@...sung.com, cw00.choi@...sung.com
Subject: Re: [RFC patch 0/5] hrtimers: Add deferrable mode

On 02/21/2014 09:56 AM, Thomas Gleixner wrote:
> Deferrable timers are beneficial for power saving. They behave like
> standard timers except that their expiry can be delayed up to the
> expiry of the next non deferred timer. That prevents them from waking
> up cpus from deep idle periods.

What does this accomplish that can't be done with hrtimers with enormous
slack?

--Andy
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