linux-kernel - Re: Strange entries in /proc/acpi/thermal

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Date:	Thu, 12 Oct 2006 21:28:12 -0700
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Robert Hancock <hancockr@...w.ca>
CC:	linux-kernel <linux-kernel@...r.kernel.org>,
	"Brown, Len" <len.brown@...el.com>,
	"Pallipadi, Venkatesh" <venkatesh.pallipadi@...el.com>
Subject: Re: Strange entries in /proc/acpi/thermal_zone for Thinkpad X60

Robert Hancock wrote:
> I would expect they wouldn't, otherwise there would be no reason for 
> the BIOS people to set up two thermal zones..

Ah, OK.  I misunderstood what thermal zones are.

> How do you know they are one for each core? ACPI thermal zones can be 
> anywhere in the machine that needs OS-controlled cooling. Could be the 
> CPU heatsink, voltage regulator, or someplace else.

Right, bad assumption on my part.  Is there any way to find out what 
they might correspond to?  /proc/acpi/ibm/thermal has a bunch of 
temperature-like numbers in them; I guess there should be some 
correlation between those and the thermal zones.

> I think we need more information to decide what is going on here.. 
> what temperatures are registering in the thermal zones when the CPU 
> clock is being limited?

I'll gather a bit more info.

    J
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