From owner-freebsd-current@FreeBSD.ORG  Sun Sep 12 08:30:47 2010
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
Delivered-To: freebsd-current@FreeBSD.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id C616D106564A;
	Sun, 12 Sep 2010 08:30:47 +0000 (UTC) (envelope-from avg@icyb.net.ua)
Received: from citadel.icyb.net.ua (citadel.icyb.net.ua [212.40.38.140])
	by mx1.freebsd.org (Postfix) with ESMTP id ACF828FC14;
	Sun, 12 Sep 2010 08:30:46 +0000 (UTC)
Received: from porto.topspin.kiev.ua (porto-e.starpoint.kiev.ua
	[212.40.38.100])
	by citadel.icyb.net.ua (8.8.8p3/ICyb-2.3exp) with ESMTP id LAA24595;
	Sun, 12 Sep 2010 11:30:44 +0300 (EEST)
	(envelope-from avg@icyb.net.ua)
Received: from localhost.topspin.kiev.ua ([127.0.0.1])
	by porto.topspin.kiev.ua with esmtp (Exim 4.34 (FreeBSD))
	id 1OuhxU-000FiF-Fh; Sun, 12 Sep 2010 11:30:44 +0300
Message-ID: <4C8C8FB3.9060100@icyb.net.ua>
Date: Sun, 12 Sep 2010 11:30:43 +0300
From: Andriy Gapon <avg@icyb.net.ua>
User-Agent: Mozilla/5.0 (X11; U; FreeBSD amd64; en-US;
	rv:1.9.2.8) Gecko/20100822 Lightning/1.0b2 Thunderbird/3.1.2
MIME-Version: 1.0
To: Alexander Motin <mav@FreeBSD.org>
References: <4C8BCAC5.5050008@root.org>
	<mailpost.1284277196.1767764.83548.mailing.freebsd.current@FreeBSD.cs.nctu.edu.tw>
	<4C8C8B64.8020907@FreeBSD.org>
In-Reply-To: <4C8C8B64.8020907@FreeBSD.org>
X-Enigmail-Version: 1.1.2
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
Cc: FreeBSD-Current <freebsd-current@FreeBSD.org>,
	Norikatsu Shigemura <nork@FreeBSD.org>
Subject: Re: CPU C-state storange on Panasonic TOUGH BOOK CF-R9
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
	<freebsd-current.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>, 
	<mailto:freebsd-current-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-current>
List-Post: <mailto:freebsd-current@freebsd.org>
List-Help: <mailto:freebsd-current-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sun, 12 Sep 2010 08:30:47 -0000

on 12/09/2010 11:12 Alexander Motin said the following:
> Just an idea. Limits of 100 and 1000 are defined for detection of
> C-states using P_LVLx_LAT registers. Because _CST explicitly specifies
> which states are available, these limitations may not apply there. I
> would try to comment these checks in acpi_cpu_cx_cst() and look what
> happen. At least I haven't found in ACPI 3.0 specification any latency
> limits applied to _CST.

Not 100% sure, but what you said does make sense.
I couldn't also find any such wording in ACPI 4.0 spec.

-- 
Andriy Gapon