From owner-freebsd-current@FreeBSD.ORG  Thu Jul  7 01:04:03 2005
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
X-Original-To: freebsd-current@freebsd.org
Delivered-To: freebsd-current@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id CD37F16A41C
	for <freebsd-current@freebsd.org>; Thu,  7 Jul 2005 01:04:03 +0000 (GMT)
	(envelope-from scottl@samsco.org)
Received: from pooker.samsco.org (pooker.samsco.org [168.103.85.57])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 68EE643D48
	for <freebsd-current@freebsd.org>; Thu,  7 Jul 2005 01:04:03 +0000 (GMT)
	(envelope-from scottl@samsco.org)
Received: from [192.168.254.14] (imini.samsco.home [192.168.254.14])
	(authenticated bits=0)
	by pooker.samsco.org (8.13.3/8.13.3) with ESMTP id j671ARPd027794;
	Wed, 6 Jul 2005 19:10:28 -0600 (MDT)
	(envelope-from scottl@samsco.org)
Message-ID: <42CC7E92.1010204@samsco.org>
Date: Wed, 06 Jul 2005 19:00:02 -0600
From: Scott Long <scottl@samsco.org>
User-Agent: Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US;
	rv:1.7.7) Gecko/20050416
X-Accept-Language: en-us, en
MIME-Version: 1.0
To: "Wilkinson, Alex" <alex.wilkinson@dsto.defence.gov.au>
References: <42C6DA5F.9070303@gneto.com>
	<6.2.1.2.0.20050703212843.07889088@64.7.153.2>
	<20050705011650.R80892@lexi.siliconlandmark.com>
	<70e8236f050706002655cd9a0c@mail.gmail.com>
	<42CBE7F4.9040106@samsco.org>
	<83fb4207210a3f028b8ee2d2289573c4@xcllnt.net>
	<42CBFC36.1040406@samsco.org>
	<6.2.1.2.0.20050706115146.07a59d08@64.7.153.2>
	<6.2.1.2.0.20050706115824.07a58588@64.7.153.2>
	<42CC1085.6090504@samsco.org>
	<20050707005155.GC7289@squash.dsto.defence.gov.au>
In-Reply-To: <20050707005155.GC7289@squash.dsto.defence.gov.au>
Content-Type: text/plain; charset=us-ascii; format=flowed
Content-Transfer-Encoding: 7bit
X-Spam-Status: No, score=-2.8 required=3.8 tests=ALL_TRUSTED autolearn=failed 
	version=3.0.2
X-Spam-Checker-Version: SpamAssassin 3.0.2 (2004-11-16) on pooker.samsco.org
Cc: freebsd-current@freebsd.org, Mike Tancsa <mike@sentex.net>
Subject: Re: 6.0-CURRENT SNAP004 hangs on amr (long)
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: Thu, 07 Jul 2005 01:04:03 -0000

Wilkinson, Alex wrote:

>     0n Wed, Jul 06, 2005 at 11:10:29AM -0600, Scott Long wrote: 
> 
>     >I wonder if the AMR interrupt is getting routed to the ata interrupt 
>     >pins.  With the ata driver enabled, the OS gets stuck in an infinite
>     >loop of trying to service what it thinks in an ata interrupt.  With
>     >the ata driver disabled, the ata interrupt lines stay disabled and the
>     >OS sees nothing.  Would it be possible to send an NMI to the machine
>     >while it's hung with the ata driver enabled?  If not, we can probably
>     >drop some simple printf into the ata interrupt handler.
> 
> Curious, how does one send a Non-Maskable-Interupt in FreeBSD ?
> 
>  -aW

NMI's are sent by the hardware and received by the OS.  Some 
server-class motherboards have NMI switches on them.  In the ISA
days, it was possible to trigger an NMI by shorting 2 particular
pins in an ISA slot.

Scott