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Date: Tue, 26 Nov 2002 19:41:29 +0000
From: Dave Jones <davej@codemonkey.org.uk>
To: Pavel Machek <pavel@ucw.cz>
Cc: linux-kernel@vger.kernel.org, torvalds@transmeta.com, alan@redhat.com
Subject: Re: A new Athlon 'bug'.
Message-ID: <20021126194129.GA24152@suse.de>
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On Mon, Nov 25, 2002 at 10:34:47PM +0100, Pavel Machek wrote:

 > > Very recent Athlons (Model 8 stepping 1 and above) (XPs/MPs and mobiles)
 > > have an interesting problem.  Certain bits in the CLK_CTL register need
 > > to be programmed differently to those in earlier models. The problem arises
 > > when people plug these new CPUs into boards running BIOSes that are unaware
 > > of this fact.
 > What happens when bit is programed wrongly?

The documentation I have says nothing other than "...platforms are more
robust..." with the fix. It's purely a reliability thing, but as it's
fiddling with the CPU clock, it's possible that it may *slightly*
affect performance too.

		Dave

-- 
| Dave Jones.        http://www.codemonkey.org.uk
| SuSE Labs
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