Re: [linux-pm] [PATCH 1/8] PM: Add suspend block api.

From: Tony Lindgren
Date: Thu May 06 2010 - 13:38:29 EST


* Matthew Garrett <mjg@xxxxxxxxxx> [100506 10:17]:
> On Thu, May 06, 2010 at 10:14:53AM -0700, Tony Lindgren wrote:
>
> > Why would you need to constantly try to suspend in that case?
>
> Because otherwise you're awake for longer than you need to be.

If your system is idle and your hardware supports off-while-idle,
then that really does not matter. There's not much of a difference
in power savings, we're already talking over 10 days on batteries
with just off-while-idle on omaps.

If your userspace keeps polling and has runaway timers, then you
could suspend it's parent process to idle the system?

Regards,

Tony
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