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Date: Wed, 12 Feb 2003 10:57:40 -0800 (PST)
From: Linus Torvalds <torvalds@transmeta.com>
To: Jamie Lokier <jamie@shareable.org>
cc: mika.penttila@kolumbus.fi, <linux-kernel@vger.kernel.org>,
       Andi Kleen <ak@suse.de>, Dave Jones <davej@codemonkey.org.uk>,
       "Martin J. Bligh" <mbligh@aracnet.com>
Subject: Re: Re: [Bug 350] New: i386 context switch very slow compared to
 2.4 due to wrmsr (performance)
In-Reply-To: <20030212182305.GA12039@bjl1.jlokier.co.uk>
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mika.penttila@kolumbus.fi wrote:
> BTW, why is sysenter supposed to be disabled while in vm86? 

The only reason is to make vm86-mode more "compatible". In other words, 
trap the GP that happens if SYSENTER_CS is 0, and make sure vm86 mode 
works the way it historically did.

We can choose to say "screw it", I guess, and just see if it actually 
breaks anything.

		Linus

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