From owner-freebsd-current@FreeBSD.ORG  Wed Aug 18 14:07:25 2004
Return-Path: <owner-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 D2DBF16A4CE; Wed, 18 Aug 2004 14:07:25 +0000 (GMT)
Received: from green.homeunix.org (pcp04371970pcs.nrockv01.md.comcast.net
	[69.140.223.203])	by mx1.FreeBSD.org (Postfix) with ESMTP
	id 35C2943D4C; Wed, 18 Aug 2004 14:07:25 +0000 (GMT)
	(envelope-from green@green.homeunix.org)
Received: from green.homeunix.org (green@localhost [127.0.0.1])
	by green.homeunix.org (8.13.1/8.13.1) with ESMTP id i7IE7OHb022210;
	Wed, 18 Aug 2004 10:07:24 -0400 (EDT)
	(envelope-from green@green.homeunix.org)
Received: (from green@localhost)
	by green.homeunix.org (8.13.1/8.13.1/Submit) id i7IE7N30022209;
	Wed, 18 Aug 2004 10:07:23 -0400 (EDT)
	(envelope-from green)
Date: Wed, 18 Aug 2004 10:07:23 -0400
From: Brian Fundakowski Feldman <green@FreeBSD.org>
To: Don Lewis <truckman@FreeBSD.org>
Message-ID: <20040818140723.GA1525@green.homeunix.org>
References: <200408170443.i7H4hMYV005062@gw.catspoiler.org>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <200408170443.i7H4hMYV005062@gw.catspoiler.org>
User-Agent: Mutt/1.5.6i
cc: current@FreeBSD.org
Subject: Re: thoughts on system hangs after panic()
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.1
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: Wed, 18 Aug 2004 14:07:25 -0000

On Mon, Aug 16, 2004 at 09:43:21PM -0700, Don Lewis wrote:
> I suspect the cause of the system hangs after a panic that are keeping
> crash dumps from working is one of the shutdown_pre_sync handlers
> getting wedged.  The most likely culprit is syncer_shutdown(), but I
> think any of the handlers could get wedged in kthread_suspend().
> 
> Either we should skip shutdown_pre_sync entirely if RB_NOSYNC is set, or
> the handlers should obey this bit as appropriate.  The latter would
> require a little more code to be touched, but would allow for more
> flexibility.

I'll love you forever if that fixes it.

-- 
Brian Fundakowski Feldman                           \'[ FreeBSD ]''''''''''\
  <> green@FreeBSD.org                               \  The Power to Serve! \
 Opinions expressed are my own.                       \,,,,,,,,,,,,,,,,,,,,,,\