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

Tony Lindgren
2010-05-06T18:33:35Z

* Matthew Garrett <mjg@redhat.com> [100506 10:39]:
> On Thu, May 06, 2010 at 10:38:08AM -0700, Tony Lindgren wrote:
>
> > If your userspace keeps polling and has runaway timers, then you
> > could suspend it's parent process to idle the system?
>
> If your userspace is suspended, how does it process the events that
> generated a system wakeup? If we had a good answer to that then suspend
> blockers would be much less necessary.

Well if your hardware runs off-while-idle or even just
retention-while-idle, then the basic shell works just fine waking up
every few seconds or so.

Then you could keep init/shell/suspend policy deamon running until
it's time to suspend the whole device. To cut down runaway timers,
you could already freeze the desktop/GUI/whatever earlier.

Regards,

Tony