Re: [PATCH 2/2] PM / Runtime: use deferrable timer for autosuspend
From: Pavel Machek
Date: Wed Jan 13 2016 - 14:02:28 EST
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@xxxxxxxxxxxxxx>
Acked-by: Pavel Machek <pavel@xxxxxx>
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html