From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932081AbVK2QrN (ORCPT ); Tue, 29 Nov 2005 11:47:13 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932114AbVK2QrN (ORCPT ); Tue, 29 Nov 2005 11:47:13 -0500 Received: from ebiederm.dsl.xmission.com ([166.70.28.69]:37823 "EHLO ebiederm.dsl.xmission.com") by vger.kernel.org with ESMTP id S932081AbVK2QrM (ORCPT ); Tue, 29 Nov 2005 11:47:12 -0500 To: vgoyal@in.ibm.com Cc: Fernando Luis Vazquez Cao , fastboot@lists.osdl.org, linux-kernel@vger.kernel.org Subject: Re: [Fastboot] Re: [PATCH & RFC] kdump and stack overflows References: <1133183463.2327.96.camel@localhost.localdomain> <1133200815.2425.98.camel@localhost.localdomain> <20051129132730.GA3803@in.ibm.com> From: ebiederm@xmission.com (Eric W. Biederman) Date: Tue, 29 Nov 2005 09:46:21 -0700 In-Reply-To: <20051129132730.GA3803@in.ibm.com> (Vivek Goyal's message of "Tue, 29 Nov 2005 18:57:30 +0530") Message-ID: User-Agent: Gnus/5.1007 (Gnus v5.10.7) Emacs/21.4 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Vivek Goyal writes: > On Mon, Nov 28, 2005 at 11:29:29AM -0700, Eric W. Biederman wrote: >> (baring >> nmi happening during nmis) Hmm. Is there anything to keep >> us doing something bad in that case? >> >> I guess as long as we don't clear the high bit of port 0x70 we >> should be reasonably safe from the nmi firing multiple times. > > Are you referring to port 0x23 for IMCR register. No. Port 0x70 is the cmos address register. 0x71 the cmos data register. The high bit of 0x70 if the nmi enable. Although with local apics generating nmis I would be surprised if it effective in every case. :) Eric