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

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On Thu, 20 May 2010 11:11:11 +0200
Florian Mickler <florian@xxxxxxxxxxx> wrote:

> On Tue, 18 May 2010 15:11:11 +0200
> Pavel Machek <pavel@xxxxxx> wrote:
> 
> > On Thu 2010-05-13 21:11:06, Arve Hj??nnev??g wrote:
> > > Adds /sys/power/policy that selects the behaviour of /sys/power/state.
> > > After setting the policy to opportunistic, writes to /sys/power/state
> > > become non-blocking requests that specify which suspend state to
> > > enter
> > 
> > Yeah, one file selects behavior of another file, and to read available
> > states for opportunistic, you have to write to file first.
> > 
> > I still don't like the interface.
> > 
> 
> Actually, what would be a better interface? 
> 
> I wonder why it is not like this:
> 
> /sys/power/state 
> 	no change, works with and without opportunistic suspend the
> 	same. Ignores suspend blockers. Really no change. (From user
> 	perspective)
> 
> /sys/power/opportunistic
> 	On / Off
> 	While Off the opportunistic suspend is off.
> 	While On, the opportunistic suspend is on and if there are no
> 	suspend blockers the system goes to suspend. 
> 

I forgot, of course there needs to be another knob to implement the
"on" behaviour  in the opportunistic mode

 /sys/power/block_opportunistic_suspend

There you have it. One file, one purpose. 

> Cheers,
> Flo
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