Re: [RFC] New system device API

[Pavel Machek <pavel@suse.cz>]

Hi!

> > > Can I bring up an issue a little off topic? Is it currently possible for
> > > us to say 'I want to suspend X but not Y?', and if so how is it done? I
> > > ask because someone recently mentioned the spinning up and down of IDE
> > > during swsusp. That occurs because we can (AFAIK) only say suspend
> > > everything at the moment. It would be good if we could put to sleep
> > > everything except your system devices and the devices used to write
> > > the
> > 
> > Well, you need to suspend devices used to write the image, too, so you
> > have state to return to after resume. You only do not want disks to
> > spin down. Perhaps disk can just special-case it ("If I am going to
> > swsusp, I need to save state, but do not really need to spin down").
> 
> Mmm. Sounds ugly though. Would it be fair to say we want to S5 some
> devices and S3 others? Perhaps that sort of terminology might be
> helpful.

It does not sound too ugly to me. We want to do the same thing to all
devices: save their state. Then we save the image and power them down
(all of them).

Whether "normal" devices are powered before or after saving state is
unimportant detail.
								Pavel
-- 
When do you have a heart between your knees?
[Johanka's followup: and *two* hearts?]