linux-kernel - Re: 2.6.23-rc4-mm1

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Message-Id: <200709041626.27945.ak@suse.de>
Date:	Tue, 4 Sep 2007 16:26:27 +0100
From:	Andi Kleen <ak@...e.de>
To:	Alistair John Strachan <alistair@...zero.co.uk>
Cc:	Nicolas Mailhot <nicolas.mailhot@...oste.net>,
	linux-kernel@...r.kernel.org
Subject: Re: 2.6.23-rc4-mm1

> Seconded. It's been largely ignored which is annoying because the HPET
> works perfectly on this board. I assume the reason is still that nobody
> from NVIDIA verified hardward support for the hack.

It's IMHO a bad idea to add any overrides without access to data sheets
and errata sheets. The hardware might be broken and do bad
(subtle) bad things with HPET.  That's not a theoretical case.
There used to be at least one case where a chipset would occasionally
destroy the BIOS flash when HPET was force enabled.

That means for Intel it's fine to do (because errata sheets are public); but 
for Nvidia and VIA it's dangerous and should not be done.

-Andi
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