From owner-freebsd-current  Thu Jan 18  9:58:52 2001
Delivered-To: freebsd-current@freebsd.org
Received: from mail.interware.hu (mail.interware.hu [195.70.32.130])
	by hub.freebsd.org (Postfix) with ESMTP id A94F437B400
	for <current@freebsd.org>; Thu, 18 Jan 2001 09:58:28 -0800 (PST)
Received: from timbuktu-50.budapest.interware.hu ([195.70.51.242] helo=elischer.org)
	by mail.interware.hu with esmtp (Exim 3.16 #1 (Debian))
	id 14JJKD-0004rK-00; Thu, 18 Jan 2001 18:58:17 +0100
Message-ID: <3A67131B.8C50EE00@elischer.org>
Date: Thu, 18 Jan 2001 08:00:27 -0800
From: Julian Elischer <julian@elischer.org>
X-Mailer: Mozilla 4.7 [en] (X11; U; FreeBSD 5.0-CURRENT i386)
X-Accept-Language: en, hu
MIME-Version: 1.0
To: Tor.Egge@fast.no
Cc: sos@freebsd.dk, jasone@canonware.com, current@FreeBSD.ORG
Subject: Re: Debugging SMP instability (was Re: HEADS-UP: await/asleep removal 
 imminent)
References: <200101171935.UAA25627@freebsd.dk> <200101180602.HAA11429@midten.fast.no>
Content-Type: text/plain; charset=iso-8859-15
Content-Transfer-Encoding: 7bit
Sender: owner-freebsd-current@FreeBSD.ORG
Precedence: bulk
X-Loop: FreeBSD.ORG

Tor.Egge@fast.no wrote:
> 
> > Again I'll offer to run any and all code or patches to -current you
> > guys can come up with, but I simply dont have the time to sit down
> > and analyze into details what you have been doing...
> 
> The enclosed patch implements a virtual NMI pushbutton by programming
> the IOAPIC to deliver an NMI when sio1 generates an interrupt.
> 
> DDB should be defined in the kernel config file.
> 
> getty should not run on ttyd1 when this patch is applied.
> 
> A serial console on sio0 is recommended.
> 
> If you still cannot break into the kernel debugger when the machine
> locks up then a rogue device is probably blocking the system
> (or the debugger is trying to obtain a mutex held by somebody else)
> 
> - Tor Egge

cool.
What are the instructions for using this?
should something have sio1 open?
can a paperclip be used to generat the interupt by connecting pins 2 and 3?
etc.



-- 
      __--_|\  Julian Elischer
     /       \ julian@elischer.org
    (   OZ    ) World tour 2000
---> X_.---._/  from Perth, presently in:  Budapest
            v




To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-current" in the body of the message