linux-kernel - Re: [PATCH 2/3] x86: Remove cmpxchg from i386 NMI nesting code

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Message-ID: <alpine.LFD.2.00.1206110406530.29081@eddie.linux-mips.org>
Date:	Mon, 11 Jun 2012 04:14:59 +0100 (BST)
From:	"Maciej W. Rozycki" <macro@...ux-mips.org>
To:	"H. Peter Anvin" <hpa@...or.com>
cc:	Steven Rostedt <rostedt@...dmis.org>, linux-kernel@...r.kernel.org,
	Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH 2/3] x86: Remove cmpxchg from i386 NMI nesting code

On Sun, 10 Jun 2012, H. Peter Anvin wrote:

> Just use a VM or a simulator.

 That wasn't completely serious ;) -- however thanks for the hint.  I 
wonder actually if any piece of software would let the code run in a 
"pass-through" mode and record what I/O accesses went past.  I reckon 
DOSEMU used to support that (and running the VGA BIOS) -- but that piece 
did indeed require vm86.  Then the sequence recorded could be replayed 
natively.

 Thanks for the food for thought! :)

  Maciej
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