From owner-freebsd-stable@FreeBSD.ORG  Fri Jun  4 09:37:15 2010
Return-Path: <owner-freebsd-stable@FreeBSD.ORG>
Delivered-To: freebsd-stable@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 37D211065674;
	Fri,  4 Jun 2010 09:37:15 +0000 (UTC)
	(envelope-from dave@jetcafe.org)
Received: from hugeraid.jetcafe.org (hugeraid.jetcafe.org [205.147.26.109])
	by mx1.freebsd.org (Postfix) with ESMTP id 1528B8FC08;
	Fri,  4 Jun 2010 09:37:14 +0000 (UTC)
Received: from hugeraid.jetcafe.org (localhost [127.0.0.1])
	by hugeraid.jetcafe.org (8.13.8/8.13.8) with ESMTP id o549bEFt054288;
	Fri, 4 Jun 2010 02:37:14 -0700 (PDT)
Message-Id: <201006040937.o549bEFt054288@hugeraid.jetcafe.org>
X-Mailer: exmh version 2.7.2 01/07/2005 with nmh-1.0.4
To: John Baldwin <jhb@freebsd.org>
In-reply-to: <201006031029.00588.jhb@freebsd.org> 
References: <201005272348.o4RNmgWh014243@hugeraid.jetcafe.org> 
	<201006011020.01318.jhb@freebsd.org>
	<201006022237.o52MbxZM066281@hugeraid.jetcafe.org>
	<201006031029.00588.jhb@freebsd.org>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Date: Fri, 04 Jun 2010 02:37:14 -0700
From: Dave Hayes <dave@jetcafe.org>
Cc: Garrett Cooper <yanefbsd@gmail.com>, freebsd-stable@freebsd.org,
	Clifton Royston <cliftonr@lava.net>,
	Jeremy Chadwick <freebsd@jdc.parodius.com>
Subject: Re: Locking a file backed mdconfig into memory 
X-BeenThere: freebsd-stable@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Production branch of FreeBSD source code <freebsd-stable.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>, 
	<mailto:freebsd-stable-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-stable>
List-Post: <mailto:freebsd-stable@freebsd.org>
List-Help: <mailto:freebsd-stable-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>,
	<mailto:freebsd-stable-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 04 Jun 2010 09:37:15 -0000

John Baldwin <jhb@freebsd.org> writes:
> On Wednesday 02 June 2010 6:37:59 pm Dave Hayes wrote:
>> John Baldwin <jhb@freebsd.org> writes:
>> > Ok, if you are using a stock mfsroot from a release build, that should
>> > work fine.  If you have built a custom mfsroot that is larger, then
>> > you may need to increase NKPT on i386.  In very recent 7 and later you
>> > can do this by setting it to a new value in your kernel config.  In
>> > older versions you can do this by manually adding a #define to set a
>> > new value of NKPT in opt_global.h or hacking on the source directly.
>> 
>> Is this also true for amd64 (which is my particular target)?
>
> It might be.  What is the panic you are seeing?

I can't see the panic as it repeatedly scrolls across the console screen
faster than I can read it. In this case the mfsroot is around 275MB. 

I have noticed that sometimes I can build an mfsroot that does not crash
of this size.
-- 
Dave Hayes - Consultant - Altadena CA, USA - dave@jetcafe.org 
>>> The opinions expressed above are entirely my own <<<

People usually oppose things because they are ignorant of them.