Re: [PATCH 1/8] PM: Add suspend block api.

Pavel Machek
2010-05-28T06:43:57Z

Hi!

> >> >> How often would we retry suspending?
> >> >
> >> > Well based on some timer, the same way the screen blanks? Or five
> >> > seconds of no audio play? So if the suspend fails, then reset whatever
> >> > userspace suspend policy timers.
> >> >
> >> >> If we fail to suspend, don't we have to resume all the drivers that
> >> >> suspended before the one that failed?  (Maybe I'm mistaken here)
> >> >
> >> > Sure, but I guess that should be a rare event that only happens when
> >> > you try to suspend and something interrupts the suspend.
> >> >
> >>
> >> This is not a rare event. For example, the matrix keypad driver blocks
> >> suspend when a key is down so it can scan the matrix.
> >
> > Sure, but how many times per day are you suspending?
>
> How many times we successfully suspend is irrelevant here. If the
> driver blocks suspend the number of suspend attempts depend on your
> poll frequency.

Actually, this is quite interesting question I'd like answer here:

"Sure, but how many times per day are you suspending?"

I suspect it may be in 1000s, but it would be cool to get better
answer -- so that people knew what we are talking about here.
Pavel
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