On Mon 2009-08-10 14:12:11, Darrick J. Wong wrote: > On Sat, Aug 08, 2009 at 11:48:30PM +0200, Pavel Machek wrote: > > > > Uhuh. This is hwmon documentation AFAICT; so a) it should be > > documented here, and b) interface should be generic so that it works > > without ACPI, too. > > Perhaps it is time to set up a netlink interface for all the hwmon drivers? > >From what I can tell, some of the chips can send interrupts when alarms go off, > though I don't see much of an effort by the drivers to catch those interrupts. > For sure there's no netlink socket that one can read for that sort of thing; a > far as I can tell, client programs are expected to bang on sysfs periodicially > to figure out when things have gone bad. Is netlink right interface for that? Perhaps /sys files should be pollable? > > > The ACPI spec is silent on this matter. It's not clear if the OS is supposed > > > to monitor and take action on its own when power > cap, or if the hardware/BIOS > > > will take action, or possibly both...? > > > > Having user<->kernel interface that is well... uh... undocumented > > makes little sense. > > So it goes with ACPI. Given that things like Node Manager and Active Energy > Manager claim to be able to control power use, I would guess that it is > generally likely that a power monitoring system would take action on its own to > cut power use, and not necessarily bothering to tell the OS exactly what it's > doing. I guess this needs to be clarified/documented properly because it should go anywhere near mainline. Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
