From owner-freebsd-current@FreeBSD.ORG Tue Apr 17 21:05:25 2007 Return-Path: X-Original-To: current@freebsd.org Delivered-To: freebsd-current@FreeBSD.ORG Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 7C51316A400 for ; Tue, 17 Apr 2007 21:05:25 +0000 (UTC) (envelope-from rwatson@FreeBSD.org) Received: from cyrus.watson.org (cyrus.watson.org [209.31.154.42]) by mx1.freebsd.org (Postfix) with ESMTP id 184D013C487 for ; Tue, 17 Apr 2007 21:05:25 +0000 (UTC) (envelope-from rwatson@FreeBSD.org) Received: from fledge.watson.org (fledge.watson.org [209.31.154.41]) by cyrus.watson.org (Postfix) with ESMTP id BAF8B47220; Tue, 17 Apr 2007 17:05:23 -0400 (EDT) Date: Tue, 17 Apr 2007 22:05:23 +0100 (BST) From: Robert Watson X-X-Sender: robert@fledge.watson.org To: Tillman Hodgson In-Reply-To: <20070417181627.GA1225@seekingfire.com> Message-ID: <20070417220339.E2913@fledge.watson.org> References: <20070417153357.GA1335@seekingfire.com> <20070417173005.O42234@fledge.watson.org> <20070417181627.GA1225@seekingfire.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Cc: current@freebsd.org Subject: Re: Panic on boot with April 16 src (lengthy info attached) X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 17 Apr 2007 21:05:25 -0000 On Tue, 17 Apr 2007, Tillman Hodgson wrote: > On Tue, Apr 17, 2007 at 05:32:32PM +0100, Robert Watson wrote: > >> There's quite a bit of stuff in here, but I can speak to this one: Andre's >> recent TCP timer change causes TCP to run without Giant when >> debug.mpsafenet=0. This leads to panics with INVARIANTS, and non-MPSAFE >> code running without Giant otherwise. > > Thanks Robert, that did indeed let me boot. I appreciate your help :-) > > I originally put it in there to work around a LOR that I was experiencing > (based on you mentioning it in an email to current@ Sun 18 Mar 2007 15:50). > http://sources.zabbadoz.net/freebsd/lor/191.html doesn't show any changes to > that particular LOR, do you happen to know if there's any ongoing work on > this? I'm very willing to act as a test system. I chatted with Andre about the panic earlier this afternoon, and it sounds like the fix is straight forward. I would anticipate seeing it committed in the near future. I'll send out an e-mail explaining the above lock order reversal tomorrow morning. I understand that several people have been looking at this, so perhaps one of those people will reply talking about it before then. :-) Robert N M Watson Computer Laboratory University of Cambridge