From mboxrd@z Thu Jan 1 00:00:00 1970 From: Nate Lawson Subject: Re: ACPI Thermal Shutdown on Boot Date: Sun, 15 Feb 2004 12:24:23 -0800 (PST) Sender: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Message-ID: <20040215122249.V20266@root.org> References: <3ACA40606221794F80A5670F0AF15F8401CBB6A6@PDSMSX403.ccr.corp.intel.com> <20040213190646.GH6804@openzaurus.ucw.cz> Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Return-path: In-Reply-To: <20040213190646.GH6804-u08AdweFZfgxtPtxi4kahqVXKuFTiq87@public.gmane.org> Errors-To: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: Pavel Machek Cc: "Yu, Luming" , Karol Kozimor , acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: linux-acpi@vger.kernel.org On Fri, 13 Feb 2004, Pavel Machek wrote: > > > > If I understand you correctly, 30 seconds is certainly > > > enough time to burn > > > > a CPU when the fan has failed, isn't it? > > > > > > Our old default poll interval was 30 seconds so this doesn't change > > > anything. I know DeadRat takes more than 30 seconds from "shutdown -h > > > now" to power off. All modern CPUs have a thermal shutdown builtin. > > > Think of _CRT as more of "system temp too high, shut down as > > > soon as you > > > can." > > > > If I didn't miss something, Chris Jensen was unable to adjust > > critical trip point due > > to current policy. Anyway, 57C isn't a real critical temperature. It > > doesn't make sense to > > enter emergent shutdown/power.So we need sane checking here.( A sane > > _CRT ?) > > If FAN is broken, at least we can use throttling to guarantee it will > > not be over heated. > > So, throttling should be included into policy about handling critical > > trip point. > > At critical trip point, we have to shut down, according > to specs. No choice here. > > If their ACPI BIOS is b0rken, blacklist them. My point was that shutdown to poweroff takes about 10 seconds on FreeBSD but much longer on common Linux distributions. So even with a little delay, the system gets shut down at the same time. This is better than blacklisting the system (a Compaq laptop) and not having any _CRT protection. But Linux can do it however you want. -Nate ------------------------------------------------------- SF.Net is sponsored by: Speed Start Your Linux Apps Now. Build and deploy apps & Web services for Linux with a free DVD software kit from IBM. Click Now! http://ads.osdn.com/?ad_id=1356&alloc_id=3438&op=click