From owner-freebsd-hackers@FreeBSD.ORG Thu Sep 4 07:50:13 2003 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id E20ED16A4BF for ; Thu, 4 Sep 2003 07:50:13 -0700 (PDT) Received: from 66.237.179.130.ptr.us.xo.net (66.237.179.130.ptr.us.xo.net [66.237.179.130]) by mx1.FreeBSD.org (Postfix) with SMTP id DB19843FF2 for ; Thu, 4 Sep 2003 07:50:12 -0700 (PDT) (envelope-from cjarvis@vci.com) Received: from no.name.available by 66.237.179.130.ptr.us.xo.net via smtpd (for mx1.freebsd.org [216.136.204.125]) with SMTP; 4 Sep 2003 14:56:14 UT Received: from mail.vci.com (unverified [192.168.123.105]) by vci-gateway.vci.com; Thu, 4 Sep 2003 10:53:01 -0400 Message-ID: Received: from mail.vci.com (HROTHGAR [192.168.5.3]) by mail.vci.com with SMTP (Microsoft Exchange Internet Mail Service Version 5.5.2653.13) id P455C1T4; Thu, 4 Sep 2003 10:53:14 -0400 From: cjarvis@vci.com Date: Thu, 04 Sep 2003 10:56:46 -0400 To: Peter Pentchev , Don Bowman , "'freebsd-hackers@freebsd.org'" In-Reply-To: <20030904131244.GU556@straylight.oblivion.bg> X-Mailer: MR/2 Internet Cruiser Edition for Windows v2.35w/35 Subject: Re: non reliable nmi X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 04 Sep 2003 14:50:14 -0000 In <20030904131244.GU556@straylight.oblivion.bg>, on 09/04/03 at 09:12 AM, Peter Pentchev said: >I haven't kept quite up to date on my x86 hardware lately (read: in the >past five to ten years), but I distinctly remember a time when everyone >referred to x86's NMI as a joke: a non-maskable interrupt that anyone >could mask using a simple CLI instruction. Not sure if this is still the >case, others would have to say if today's processors still may get so >wedged that a NMI request would simply be ignored. CLI doesn't stop an NMI, but you can mask off NMI in the CMOS RAM. On standard PC-AT platforms anyway. -- Clark ********************************************************************** This email, and any files transmitted with it, are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please advise itmail@vci.com. **********************************************************************