Hi!
> > You can break the whole power management problem down to "here are the
> > levels of low-power provided by the hardware, here are the idleness
> > triggers that may be monitored". That's it, nothing more.
> > This is powerful enough to do all the things you could want a pm layer
> > to do:
> >
> > 1) CPU's have been in their idle threads for X percent of
> > of the past measurement quantum, half clock the processors.
> >
> > 2) The user has hit the "sleep" trigger, spin down the disks,
> > reduce clock the cpus, bus, PCI controller and PCI devices.
>
> Often the 'sleep trigger' is an _absence_ of activity rather than anything
> explicit like a button being pressed. You need inactivity timers, and events
> which _reset_ those timers, on triggers like keyboard/touchscreen/serial
> input, etc.
I believe that at least thermal managment should be done in
kernelspace. You do not want to overheat your cpu because you
accidentally killed powerd, right?
Pavel
-- The best software in life is free (not shareware)! Pavel GCM d? s-: !g p?:+ au- a--@ w+ v- C++@ UL+++ L++ N++ E++ W--- M- Y- R+ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Mon Apr 30 2001 - 21:00:17 EST