From owner-freebsd-current@FreeBSD.ORG  Thu Jan 31 00:42:14 2008
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 80BEA16A41A
	for <freebsd-current@freebsd.org>; Thu, 31 Jan 2008 00:42:14 +0000 (UTC)
	(envelope-from jos@catnook.com)
Received: from lizzy.dyndns.org (209-204-188-132.dsl.static.sonic.net
	[209.204.188.132])
	by mx1.freebsd.org (Postfix) with SMTP id 23C4113C455
	for <freebsd-current@freebsd.org>; Thu, 31 Jan 2008 00:42:14 +0000 (UTC)
	(envelope-from jos@catnook.com)
Received: (qmail 1220 invoked by uid 1000); 31 Jan 2008 00:42:35 -0000
Date: Wed, 30 Jan 2008 16:42:35 -0800
From: Jos Backus <jos@catnook.com>
To: Robert Watson <rwatson@FreeBSD.org>
Message-ID: <20080131004235.GA1186@lizzy.catnook.local>
Mail-Followup-To: Robert Watson <rwatson@FreeBSD.org>,
	freebsd-current@freebsd.org, rrs@FreeBSD.org, bz@FreeBSD.org
References: <20080128180840.GA9582@lizzy.catnook.local>
	<20080128204730.I56811@fledge.watson.org>
	<20080129015916.GA5413@lizzy.catnook.local>
	<20080130134307.P41201@fledge.watson.org>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20080130134307.P41201@fledge.watson.org>
User-Agent: Mutt/1.5.17 (2007-11-01)
Cc: rrs@FreeBSD.org, freebsd-current@freebsd.org, bz@FreeBSD.org
Subject: Re: panic: Lock so_rcv_sx not exclusively locked
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
Reply-To: jos@catnook.com
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, 31 Jan 2008 00:42:14 -0000

On Wed, Jan 30, 2008 at 01:45:08PM +0000, Robert Watson wrote:
[snip]
> Thanks, looks like that's enough for now.  I've attached a patch, could you 
> let me know if it works?  There turned out to be a number of issues here, 
> not least the possibility of an inter-thread deadlock if the blocked socket 
> read was never going to return, so if you could watch out for processes 
> failing to exit, not just panics, that would be good.  I've CC'd Randall as 
> this change touches SCTP in a few places.

After applying this patch I can no longer panic the system by killing
npviewer.bin. Firefox feels more responsive, too.

Thanks, Robert!

-- 
Jos Backus
jos at catnook.com