Re: [RFD] Automatic suspend

Arjan van de Ven
2009-02-16T22:55:59Z

On Mon, 16 Feb 2009 23:51:16 +0100
Pavel Machek <pavel@suse.cz> wrote:

> 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.

but spin down happens on non-activity ;)
it's more a slumber than a power down

--
Arjan van de Ven Intel Open Source Technology Centre
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