Re: [PATCH v5 3/3] mac80211: implement dynamic power save

[Kalle Valo <kalle.valo@nokia.com>]

Matthew Garrett <mjg59@srcf.ucam.org> writes:

> On Sun, Dec 28, 2008 at 02:59:35PM +0200, Kalle Valo wrote:
>> Matthew Garrett <mjg59@srcf.ucam.org> writes:
>> 
>> > Are we able to estimate the worst-case latency that will be introduced 
>> > by this? If so, it would be helpful to tie it into the pm_qos framework.
>> 
>> I'm not familiar with pm_qos framework, unfortunately, but there's
>> some work to do still to get mac80211 client power save implemention
>> into shape and I would like get the basics implemented first. After
>> that is done, we could start looking at the pm_qos framework and see
>> if it makes sense to use it.
>
> It allows userspace applications to register their latency requirements. 
> There's a notifier chain that then allows drivers (or subsystems) to be 
> notified of the current requirements, the idea being that they can then 
> limit their deepest power saving mode to one that still satisfies the 
> userspace constraints.

Do these constrainsts also include network latency? Do you have any
suggestions for bedtime reading? :)

-- 
Kalle Valo