Re: [RFD] Automatic suspend

Pavel Machek
2009-02-16T22:51:16Z

Hi!

> > Userland should never ever control the state of a device like this
> > directly. It should do so by a) closing the device and b) setting
> > latency / functional requirements.
>
> The user, however, may want to forcibly put a device into a low power state
> without stopping all of the applications that depend on it (eg. have it open).
> Do you think that we shouldn't allow users to do such things?

I don't think we should do this... of you want device to be powered
down, just don't keep it open. revoke should be enough :-).

...one execption here is the disk driver; unmounting filesystems to
let the disk spin down is probably too heavy.

--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html