cvs commit: src/sys/dev/acpica acpi_thermal.c

[Hajimu UMEMOTO]

Hi,

>>>>> On Wed, 20 Jul 2005 11:00:54 +0200
>>>>> Jeremie Le Hen <jeremie at le-hen.org> said:

>   Implement passive cooling.  It is enabled for tz0 by default where
>   it is available.

jeremie> I maybe missed a mail someday, but could you explain in a cursory
jeremie> fashion what this does please ? 

It does cooling without fans by decreasing CPU speed when a
temperature bacome higher than hw.acpi.thermal.tz0._PSV.
It is described in ACPI Specification 12.1.5 Passive Cooling:

	http://acpi.info/spec20c.htm

Sincerely,

--
Hajimu UMEMOTO @ Internet Mutual Aid Society Yokohama, Japan
ume at mahoroba.org  ume@{,jp.}FreeBSD.org
http://www.imasy.org/~ume/