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Re: [PATCH 2/2] PM / Runtime: use deferrable timer for autosuspend

From Pavel Machek <pavel@ucw.cz>
Newsgroups linux.kernel
Subject Re: [PATCH 2/2] PM / Runtime: use deferrable timer for autosuspend
Date 2016-01-13 20:10 +0100
Message-ID <qQyXU-41l-11@gated-at.bofh.it> (permalink)
References <qQaLV-3Xe-25@gated-at.bofh.it> <qQaLV-3Xe-23@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On Tue 2016-01-12 18:17:20, Lucas Stach wrote:
> The timeouts used in PM autosuspend are relatively coarse (the shortest
> I could find in a quick search through the kernel is 50ms). As they are
> already handled relaxed by saving the overhead of always rearming the
> timer by opportunistically suspending a device a bit early, it should
> not matter if the the timeout is missed slightly.
> 
> By using a deferrable timer the CPU will not be woken just to handle
> the autosuspend timeout, but handling will be batched with other
> wakeups in the system.
> 
> Signed-off-by: Lucas Stach <l.stach@pengutronix.de>

Acked-by: Pavel Machek <pavel@ucw.cz>

-- 
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[PATCH 2/2] PM / Runtime: use deferrable timer for autosuspend Lucas Stach <l.stach@pengutronix.de> - 2016-01-12 18:20 +0100
  Re: [PATCH 2/2] PM / Runtime: use deferrable timer for autosuspend Pavel Machek <pavel@ucw.cz> - 2016-01-13 20:10 +0100

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