From owner-freebsd-hackers  Fri May  5 12: 6:34 2000
Delivered-To: freebsd-hackers@freebsd.org
Received: from fw.wintelcom.net (ns1.wintelcom.net [209.1.153.20])
	by hub.freebsd.org (Postfix) with ESMTP id 7850137BBB2
	for <hackers@FreeBSD.ORG>; Fri,  5 May 2000 12:06:31 -0700 (PDT)
	(envelope-from bright@fw.wintelcom.net)
Received: (from bright@localhost)
	by fw.wintelcom.net (8.10.0/8.10.0) id e45JbKP04572;
	Fri, 5 May 2000 12:37:20 -0700 (PDT)
Date: Fri, 5 May 2000 12:37:20 -0700
From: Alfred Perlstein <bright@wintelcom.net>
To: Jin Guojun <jin@george.lbl.gov>
Cc: hackers@FreeBSD.ORG
Subject: Re: Can NMI drop a hanging FreeBSD kernel into DDB?
Message-ID: <20000505123720.D29830@fw.wintelcom.net>
References: <200005051831.LAA25307@george.lbl.gov> <20000505122029.C29830@fw.wintelcom.net>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
X-Mailer: Mutt 1.0.1i
In-Reply-To: <20000505122029.C29830@fw.wintelcom.net>; from bright@wintelcom.net on Fri, May 05, 2000 at 12:20:29PM -0700
Sender: owner-freebsd-hackers@FreeBSD.ORG
Precedence: bulk
X-Loop: FreeBSD.ORG

* Alfred Perlstein <bright@wintelcom.net> [000505 12:21] wrote:
> * Jin Guojun <jin@george.lbl.gov> [000505 12:03] wrote:
> > Hi,
> > 
> > I am currently experimenting kernel hanging problem even through I have 
> > compiled the kernel with DDB enabled.
> > 
> > How can I make a hanging kernel into DDB? Will grounding the NMI do it?
> > 
> > Thanks for any suggestions,
> 
> That's a bit extreme.
> 
> hit ctrl+alt+esc on the console, or send a serial break if using
> a serial console, make sure you have BREAK_TO_DEBUGGER if you're
> using a serial console.

Forgot to mention that an NMI will also work.

-Alfred


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