From owner-svn-src-all@FreeBSD.ORG  Tue Sep 21 17:59:36 2010
Return-Path: <owner-svn-src-all@FreeBSD.ORG>
Delivered-To: svn-src-all@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 26651106567A;
	Tue, 21 Sep 2010 17:59:36 +0000 (UTC) (envelope-from mj@feral.com)
Received: from ns1.feral.com (ns1.feral.com [192.67.166.1])
	by mx1.freebsd.org (Postfix) with ESMTP id DF5358FC0A;
	Tue, 21 Sep 2010 17:59:35 +0000 (UTC)
Received: from [192.168.1.2] (m206-63.dsl.tsoft.com [198.144.206.63])
	by ns1.feral.com (8.14.3/8.14.3) with ESMTP id o8LHxYeG029954;
	Tue, 21 Sep 2010 10:59:34 -0700 (PDT) (envelope-from mj@feral.com)
Message-ID: <4C98F281.2080806@feral.com>
Date: Tue, 21 Sep 2010 10:59:29 -0700
From: Matthew Jacob <mj@feral.com>
Organization: Feral Software
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US;
	rv:1.9.2.9) Gecko/20100915 Thunderbird/3.1.4
MIME-Version: 1.0
To: John Baldwin <jhb@freebsd.org>
References: <201009211507.o8LF7iVv097676@svn.freebsd.org>
	<201009211250.40704.jhb@freebsd.org> <4C98E324.8090803@feral.com>
	<201009211347.28800.jhb@freebsd.org>
In-Reply-To: <201009211347.28800.jhb@freebsd.org>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
X-Greylist: Default is to whitelist mail, not delayed by milter-greylist-4.2.6
	(ns1.feral.com [192.67.166.1]);
	Tue, 21 Sep 2010 10:59:35 -0700 (PDT)
Cc: svn-src-head@freebsd.org, mdf@freebsd.org, svn-src-all@freebsd.org,
	src-committers@freebsd.org, Andriy Gapon <avg@freebsd.org>
Subject: Re: svn commit: r212964 - head/sys/kern
X-BeenThere: svn-src-all@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: "SVN commit messages for the entire src tree \(except for &quot;
	user&quot; and &quot; projects&quot; \)" <svn-src-all.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-all>,
	<mailto:svn-src-all-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/svn-src-all>
List-Post: <mailto:svn-src-all@freebsd.org>
List-Help: <mailto:svn-src-all-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-all>,
	<mailto:svn-src-all-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 21 Sep 2010 17:59:36 -0000

  FWIW, I think that this would be a *good* thing. One of the problems 
with panic is that you can't really reset the state of the world, so 
most kernel services are not reliable. Unfortunately, mechanisms for 
preserving forensics for debug require some kernel services.
>> Seems to me you are backing into interesting territory here- getting a
>> bit more like Solaris.
>>
>> If you *do* do this, then you really *do* need to stop all other CPUs
>> when you panic, or else it's likely you'll double panic more often than not.
> Yes, I don't dispute this.
>