From owner-freebsd-current@FreeBSD.ORG  Thu Jul 16 06:17:26 2009
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
Delivered-To: freebsd-current@FreeBSD.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id BCD5D1065670
	for <freebsd-current@FreeBSD.org>; Thu, 16 Jul 2009 06:17:26 +0000 (UTC)
	(envelope-from rwatson@FreeBSD.org)
Received: from cyrus.watson.org (cyrus.watson.org [65.122.17.42])
	by mx1.freebsd.org (Postfix) with ESMTP id 97C4F8FC29
	for <freebsd-current@FreeBSD.org>; Thu, 16 Jul 2009 06:17:26 +0000 (UTC)
	(envelope-from rwatson@FreeBSD.org)
Received: from fledge.watson.org (fledge.watson.org [65.122.17.41])
	by cyrus.watson.org (Postfix) with ESMTPS id 2340B46B2D;
	Thu, 16 Jul 2009 02:17:26 -0400 (EDT)
Date: Thu, 16 Jul 2009 07:17:26 +0100 (BST)
From: Robert Watson <rwatson@FreeBSD.org>
X-X-Sender: robert@fledge.watson.org
To: Alexander Best <alexbestms@math.uni-muenster.de>
In-Reply-To: <permail-2009071520472480e26a0b00004b9b-a_best01@message-id.uni-muenster.de>
Message-ID: <alpine.BSF.2.00.0907160715310.54568@fledge.watson.org>
References: <permail-2009071520472480e26a0b00004b9b-a_best01@message-id.uni-muenster.de>
User-Agent: Alpine 2.00 (BSF 1167 2008-08-23)
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed
Cc: freebsd-current@FreeBSD.org
Subject: Re: (CTRL-C to abort) flood when core dumps
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, 16 Jul 2009 06:17:27 -0000

On Wed, 15 Jul 2009, Alexander Best wrote:

> when debug.debugger_on_panic is 0, a panic occurs and the core dumps the 
> console gets flooded with the following notice:
>
> (CTRL-C to abort)
>
> could we please output the warning only once? or every 10 seconds or so?

Normally that message is printed only when a key other than ctrl-c is hit 
during the dump.  It's certainly possible to rate-limit the message, or just 
limit it to printing once, but the more interesting question is why the kernel 
thinks a key is (effectively) held down such that it needs to print 
repeatedly.  Could you tell us a bit more about your configuration -- ps/2 / 
usb / serial console?  Mouse of some sort?  Virtual machine or real machine? 
Any other problems with keyboards during normal operation?  Any chance a key 
is being held down?

Robert N M Watson
Computer Laboratory
University of Cambridge