> Non-smp linux has done this for a very long time. It works.
In fact, Linux supported this feature before processors
supporting the feature were in widespread use.
There's a test made during the Linux bootup process, and
hlt() is called only when supported by the machine.
> On Sun, 28 Jun 1998, Jordan Mendelson wrote:
>
> > I was browsing some web pages on CPU cooling and I found a reference to two
> > programs called rain and waterfall. They claim to lower your CPU's temp by
> > up to 30 C and in some cases, extend the power on a laptops battery by up to
> > 30 minutes.
> >
> > The FAQ says they do this by sending the HLT command to idle parts of the
> > CPU, thereby putting them into suspend mode causing them to stop generating
> > heat.
> >
> > Has anyone thought of implementing such a thing in the linux kernel? Their
> > webpage is:
> >
> > http://cpu.simplenet.com/leading_wintech/
> >
> >
> > Jordan
> >
> > --
> > Jordan Mendelson : http://jordy.wserv.com
> > Web Services, Inc. : http://www.wserv.com
> >
> >
> >
> > -
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> >
>
>
> -
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>
Rik.
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