Re: [PATCH 1/8] PM: Opportunistic suspend support.

Alan Stern
2010-05-27T00:47:29Z

On Wed, 26 May 2010, Arve Hjønnevåg wrote:

> > I must be missing something.  In Arve's patch 1/8, if the system is in
> > opportunistic suspend, and a wakeup event occurs but no suspend
> > blockers get enabled by the handler, what causes the system to go back
> > into suspend after the event is handled?  Isn't that a loop of some
> > sort?
> >
>
> Yes it is a loop. I think what you are missing is that it only loops
> repeatedly if the driver that aborts suspend does not use a suspend
> blocker.

You mean "the driver that handles the wakeup event". I was asking what
happened if suspend succeeded and then a wakeup occurred. But yes, if
a suspend blocker is used then its release causes another suspend
attempt, with no looping.

> > And even if it isn't, so what?  What's wrong with looping behavior?
>
> It is a significant power drain.

Not in the situation I was discussing.

Alan Stern