From owner-freebsd-current@FreeBSD.ORG  Fri Nov 19 18:54:32 2010
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
Delivered-To: freebsd-current@FreeBSD.org
Received: from [127.0.0.1] (freefall.freebsd.org [IPv6:2001:4f8:fff6::28])
	by hub.freebsd.org (Postfix) with ESMTP id D6B04106566C;
	Fri, 19 Nov 2010 18:54:32 +0000 (UTC)
	(envelope-from jkim@FreeBSD.org)
From: Jung-uk Kim <jkim@FreeBSD.org>
To: freebsd-current@FreeBSD.org
Date: Fri, 19 Nov 2010 13:54:21 -0500
User-Agent: KMail/1.6.2
References: <201011152036.48181.jkim@FreeBSD.org>
	<201011161530.20165.jkim@FreeBSD.org>
In-Reply-To: <201011161530.20165.jkim@FreeBSD.org>
MIME-Version: 1.0
Content-Disposition: inline
Content-Type: text/plain;
  charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
Message-Id: <201011191354.25486.jkim@FreeBSD.org>
Cc: Ed Schouten <ed@80386.nl>, freebsd-stable@freebsd.org,
	Hans Petter Selasky <hselasky@c2i.net>
Subject: Re: [Call for Tests] PAT issue on Apple hardware
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.5
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: Fri, 19 Nov 2010 18:54:33 -0000

On Tuesday 16 November 2010 03:30 pm, Jung-uk Kim wrote:
> On Monday 15 November 2010 08:36 pm, Jung-uk Kim wrote:
> > Often times I hear complaints like "my Mac hangs after upgrading
> > to 8.1" or "snapshot CD hangs on my brand new Mac".  I know some
> > of these complaints started happening when we switched to new PAT
> > layout.  It is so puzzling because it never happened on non-Apple
> > hardware, AFAIK.  I really like to fix this problem but I cannot
> > afford a Mac. :-P
> >
> > If you are one of those lucky people, please test the attached
> > patch and report your hardware model and any improvement or
> > regression.
> >
> > Also, I added a new tunable "vm.pmap.pat_works" so that you can
> > turn it off from loader (i.e., "set vm.pmap.pat_works=0") and
> > restore old behaviour without recompiling a new kernel.
>
> I revised this patch to make it more robust.
>
> http://people.freebsd.org/~jkim/pat-current.diff
>
> Also, I prepared a patch for stable/8.  If you have recent Apple
> hardware and it hangs with 8.1 or stable/8, please test this patch.
>
> http://people.freebsd.org/~jkim/pat-stable.diff

Anyone?  I don't want to commit it blindly. :-(

Jung-uk Kim