Re: [RFC 0/3] mac80211 powersave improvements

[Johannes Berg <johannes@sipsolutions.net>]

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On Thu, 2009-04-16 at 14:01 +0300, Kalle Valo wrote:

> >  1) improve powersave to only allow it when a single
> >     managed interface is active
> >
> >  2) disable PS when the maximum networking latency
> >     applications are are willing to put up with is
> >     smaller than the beacon interval -- in that case
> >     we cannot allow the AP to buffer frames
> 
> No problem with these.

I'll send these along with the software beacon filtering, I think.

> >  3) enable powersave by default
> >
> > The last part might be controversial?
> 
> I think this a bad idea. For normal users we should not enable powersave
> by default, at least not yet. I believe that there would be so much
> problems that we would have to revert the change eventually.

We can go with the configurable one -- and default y in wireless-testing
but default n in mainline for a while. Get press coverage etc. and at
some point flip the switch.

> > Should we have a default setting for the dynamic PS
> > timeout?
> 
> Yes. Having timeout zero makes no sense in normal laptop use.

So, what's a good default? Fairly long I'd say, maybe 500ms?

johannes

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