Message-ID: <47640579.3000706@rtr.ca>
Date: Sat, 15 Dec 2007 11:48:57 -0500
From: Mark Lord <lkml@rtr.ca>
User-Agent: Thunderbird 2.0.0.9 (X11/20071031)
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To: "David P. Reed" <dpreed@reed.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>, Ingo Molnar <mingo@elte.hu>,
       Rene Herman <rene.herman@gmail.com>, "H. Peter Anvin" <hpa@zytor.com>,
       Thomas Gleixner <tglx@linutronix.de>, linux-kernel@vger.kernel.org,
       Ingo Molnar <mingo@redhat.com>, Rene Herman <rene.herman@keyaccess.nl>,
       Pavel Machek <pavel@ucw.cz>
Subject: Re: [PATCH] x86_64: fix problems due to use of "outb" to port 80
 on some AMD64x2 laptops, etc.
References: <1184218962.12353.209.camel@chaos>	<46964352.7040301@reed.com>	<1184253339.12353.223.camel@chaos>	<469697C6.50903@reed.com>	<1184274754.12353.254.camel@chaos>	<4761F193.7090400@reed.com>	<20071214131502.GA14359@elte.hu>	<4762C551.5070003@zytor.com>	<20071215074358.GD12110@elte.hu>	<4763891A.3010004@gmail.com>	<20071215132725.GA23166@elte.hu> <20071215142929.5462b329@the-village.bc.nu> <4763FE7A.4000105@reed.com>
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This change seems rather unlikely for 2.6.24 at this point (high risk),
but could be good for 2.6.25.

One thing it should probably have for the early going,
is a simple way to turn it on/off at boot time,
so that we don't have people "stuck" unable to run
the test kernels should something weird happen.

Alan / David / Ingo,

What do you think of the idea of a *temporary* boot flag for this,
something like port80=on/off (pick a suitable name) ?

Cheers
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