From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964860AbWFSWco (ORCPT ); Mon, 19 Jun 2006 18:32:44 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S964955AbWFSWcY (ORCPT ); Mon, 19 Jun 2006 18:32:24 -0400 Received: from atrey.karlin.mff.cuni.cz ([195.113.31.123]:41435 "EHLO atrey.karlin.mff.cuni.cz") by vger.kernel.org with ESMTP id S964958AbWFSWcW (ORCPT ); Mon, 19 Jun 2006 18:32:22 -0400 Date: Tue, 20 Jun 2006 00:25:29 +0200 From: Pavel Machek To: Dave Jones , "linux-os (Dick Johnson)" , Andreas Mohr , linux-kernel@vger.kernel.org Subject: Re: [RFC/SERIOUS] grilling troubled CPUs for fun and profit? Message-ID: <20060619222528.GC1648@openzaurus.ucw.cz> References: <20060619191543.GA17187@rhlx01.fht-esslingen.de> <20060619202354.GD26759@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20060619202354.GD26759@redhat.com> User-Agent: Mutt/1.3.27i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi! > > Try it. I have had > > broken plastic heat-sink hold-downs let the entire heat-sink fall off > > the CPU. The machine just stops. > > Your single datapoint is just that, a single datapoint. > There are a number of reported cases of CPUs frying themselves. > Here's one: http://www.tomshardware.com/2001/09/17/hot_spot/page4.html > Google no doubt has more. > > Another anecdote: Upon fan failure, I once had an athlon MP *completely shatter* > (as in broke in two pieces) under extreme heat. > > This _does_ happen. If it happens to you... you needed a new cpu anyway. Anything non-historical *has* thermal protection. BTW I doubt those old athlons can be saved by cli; hlt . (Someone willing to try if old athlon can run cli; hlt code w/o heatsink?). And no, we probably do not want to enter C2 or C3 from doublefault handler. Pavel -- 64 bytes from 195.113.31.123: icmp_seq=28 ttl=51 time=448769.1 ms