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Subject: Re: SMP kernel overheats
References: <20010104191237.A580@wells.org.uk> <20010104111913.B292@fw.wintelcom.net>
From: Lowell Gilbert <lowell@world.std.com>
Date: 04 Jan 2001 16:30:04 -0500
In-Reply-To: bright@wintelcom.net's message of "4 Jan 2001 20:19:33 +0100"
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bright@wintelcom.net (Alfred Perlstein) writes:

> * Michael Wells <michael@wells.org.uk> [010104 11:16] wrote:
> > 
> > With that in mind, is it fair to ask for support of SMP systems to
> > change at some point to include the instructions to run the chips
> > cooler? I note the comment on temperature stability, but I think my
> > mileage is varying.
> 
> While it would be a nice feature, anyone depending on it is not being
> very bright about it.  Basically, you don't want a machine that's
> vulnerable to a "while bomb":

Or to look at it a different way, there *is* a good reason for halting
idle processors: avoiding the waste of electricity on executing
no-ops.  Temperature, however, is *not* a good reason, because as
several people have pointed out, that "solution" *depends* on your
leaving the machine idle for a substantial fraction of its cycles.  If
your machine can't run safely without being idle a lot of the time,
the operating system isn't the place to fix the "problem".


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