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SubjectRe: [suspend/resume] Re: userspace notification from module
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Dnia 3 stycznia 2010 0:29 	"Rafael J. Wysocki" <rjw@sisk.pl> napisał(a):
> > - could be even used partialy by pm-utils
> > - it is perfect just to notify about event
>
> OK, but why exactly do _you_ need that to happen?
>
> There's one important drawback of making the kernel generate the notification.
> Namely, even if your userspace task is notified by the kernel of a PM event,
> that doesn't mean it'll have the time to act upon that, because the kernel will
> attempt to freeze it right after the notification has been sent. This means
> you'd need a way to make the kernel wait for your user space process to finish
> it's job before continuing the suspend/hibernate process. Otherwise it's not
> going to be very useful.
>

So if it is bad idea, we could create more advenced implementation.
i.e. IPC or callbacks for this kind of events.

There is vision in my mind to have alternative to pm-utils,
but even more powerfull and easy to implement in program.
I could try to implement something like that.

Rafael i'm open for Your suggestions.

Best regards.
Bartłomiej Zimoń
PLD Linux, Kadu Team, FreeRunner user
http://kadu-im.blogspot.com/

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