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Subject: Re: Pentium 4 and 2.4/2.5
To: kernel@kvack.org
Date: Wed, 8 Nov 2000 18:47:40 +0000 (GMT)
Cc: alan@lxorguk.ukuu.org.uk (Alan Cox),
        bapper@piratehaven.org (Brian Pomerantz),
        torvalds@transmeta.com (Linus Torvalds), linux-kernel@vger.kernel.org
In-Reply-To: <Pine.LNX.3.96.1001108132530.8587A-100000@kanga.kvack.org> from "kernel@kvack.org" at Nov 08, 2000 01:27:36 PM
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From: Alan Cox <alan@lxorguk.ukuu.org.uk>
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> On Wed, 8 Nov 2000, Alan Cox wrote:
> 
> > What state does it leave the condition codes ?  That matters. 
> 
> Alan, rep ; nop is one of the suggested 2 byte fillers in the Athon
> optimization guide; it's handled during instruction decode and is
> completely free.  It also has no effect on K6s.

Ok. Issue settled. So 'rep nop' is safe. Ok that can get into the spinlocks
for 2.2.18


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