Subject: Re: New power management framework for sysmon
To: Jason Thorpe <>
From: Johnny Billquist <>
List: current-users
Date: 04/21/2003 22:47:26
On Mon, 21 Apr 2003, Jason Thorpe wrote:

> On Monday, April 21, 2003, at 07:54  AM, Ignatios Souvatzis wrote:
> > Whether software interupts are handled by the BIOS or the kernel 
> > doesn't
> > change much ... although I guess the kernel is a bit more likely to go
> > incommunicado. You (kernel) switch the fans off, block interupts,
> > go into a tight loop -> the machine will melt, right?
> But you can't really have it both ways.  If you're handing power 
> management related traps/interrupts, the firmware can't be.

VAXen do it "right". You have a yellow temp alert, which the software can
take care of any way it seem fit. If temp rises a bit more, you get a
red temp alert, and the machine powers down unconditionally.

So, yes, it could be handled both ways.
There is nothing new under the sun, and it was better in the past, when
computers were computers, and video games were video games. :-)


Johnny Billquist                  || "I'm on a bus
                                  ||  on a psychedelic trip
email:           ||  Reading murder books
pdp is alive!                     ||  tryin' to stay hip" - B. Idol