linux-kernel - Re: [PATCH/RFC 0/4] Deferrable timers support for timerfd API

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Message-ID: <20120917055306.GA29081@lizard>
Date:	Sun, 16 Sep 2012 22:53:07 -0700
From:	Anton Vorontsov <cbouatmailru@...il.com>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	Pekka Enberg <penberg@...nel.org>,
	Leonid Moiseichuk <leonid.moiseichuk@...ia.com>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
	Colin Cross <ccross@...roid.com>,
	Arve Hjønnevåg <arve@...roid.com>,
	Davide Libenzi <davidel@...ilserver.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>,
	John Stultz <john.stultz@...aro.org>, linux-pm@...r.kernel.org,
	linux-kernel@...r.kernel.org, linaro-kernel@...ts.linaro.org,
	patches@...aro.org, kernel-team@...roid.com
Subject: Re: [PATCH/RFC 0/4] Deferrable timers support for timerfd API

Hi all,

On Sat, Sep 01, 2012 at 10:43:35PM -0700, Anton Vorontsov wrote:
> This patch set implements a userland-side API for generic deferrable
> timers, per linux/timer.h:
> 
>  * A deferrable timer will work normally when the system is busy, but
>  * will not cause a CPU to come out of idle just to service it; instead,
>  * the timer will be serviced when the CPU eventually wakes up with a
>  * subsequent non-deferrable timer.
> 
> These timers are crucial for power saving, i.e. periodic tasks that want
> to work in background when the system is under use, but don't want to
> cause wakeups themselves.

Just a friendly ping. Does anyone had a chance to look into this,
whether the idea bad or good, or whether the implementation is OK?

Thanks!

Anton.
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