From owner-freebsd-current  Wed Jan 17 10:40: 7 2001
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Date: Wed, 17 Jan 2001 13:39:40 -0500 (EST)
From: Garrett Wollman <wollman@khavrinen.lcs.mit.edu>
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To: John Baldwin <jhb@FreeBSD.org>
Cc: current@FreeBSD.org
Subject: Re: Atomic breakage?
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<<On Wed, 17 Jan 2001 10:28:03 -0800 (PST), John Baldwin <jhb@FreeBSD.org> said:

> person was referring to:  on Pentiums with stepping < 0xc, a cmpxchg8b that
> crosses a page boundary triggers an illegel opcode fault rather than a page
> fault if the second page is missing.

This is (part of) the famous `F00F bug'.

-GAWollman



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