linux-kernel - Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay override

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Message-ID: <20071231122949.58edd1d2@the-village.bc.nu>
Date:	Mon, 31 Dec 2007 12:29:49 +0000
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Pavel Machek <pavel@....cz>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Rene Herman <rene.herman@...access.nl>,
	Ingo Molnar <mingo@...e.hu>, dpreed@...d.com,
	Islam Amer <pharon@...il.com>, hpa@...or.com,
	Ingo Molnar <mingo@...hat.com>,
	Andi Kleen <andi@...stfloor.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay override

> "You plug in PCI DEBUG card and it overclocks your machine" is bad
> scenario.. (I don't know if it does... can PCI card emulate ISA timings?)

Easily. Its a bit more restricted by later spec revisions but it can halt
your box of a week or two if it wants. Video cards used to pull this
stunt for marketing benchmark numbers.
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