Re: [RFC] sleepy linux

Oliver Neukum
2007-12-26T23:15:39Z

Am Mittwoch, 26. Dezember 2007 21:32:58 schrieb Pavel Machek:
> On Wed 2007-12-26 21:23:37, Oliver Neukum wrote:
> > Am Mittwoch, 26. Dezember 2007 21:17:22 schrieb Pavel Machek:

> > > Is there an easy way to tell if all the devices are runtime suspended?
> >
> > Do you really want to know whether they are suspended or whether they
> > could be suspended?
>
> If they are suspended.
>
> My plan is: let the drivers autosuspend on their own. If I see all of
> them are autosuspended, then it looks like great time to put whole
> system into s2ram...

Your calculation of cost/benefit will be wrong. A driver will have timeouts
based on the cost of a suspend/resume cycle of that device only.
You'd have to calculate of keeping the whole system awake against that.

Regards
Oliver