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From: Jung-uk Kim <jkim@FreeBSD.org>
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Date: Fri, 19 Nov 2010 13:54:21 -0500
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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
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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