Messages in this thread |  | | Date | Fri, 27 Apr 2001 12:58:45 +0200 | From | Pavel Machek <> | Subject | Re: Let init know user wants to shutdown [linux-power] [linux-pm-devel] [linux-kernel-mailing-list] [some-other-list] |
| |
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/
|  |