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Date: Wed, 16 Apr 2008 11:18:20 -0400
From: "H. Peter Anvin" <hpa@zytor.com>
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To: Ingo Molnar <mingo@elte.hu>
CC: Mathieu Desnoyers <compudj@krystal.dyndns.org>,
       Andi Kleen <andi@firstfloor.org>, akpm@osdl.org,
       Jeremy Fitzhardinge <jeremy@goop.org>,
       Steven Rostedt <rostedt@goodmis.org>,
       "Frank Ch. Eigler" <fche@redhat.com>, linux-kernel@vger.kernel.org
Subject: Re: [RFC PATCH] x86 NMI-safe INT3 and Page Fault (v2)
References: <20080414230344.GA16061@Krystal> <20080414230530.GB16061@Krystal> <20080416130605.GG6304@elte.hu> <20080416151054.GA32456@elte.hu>
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Ingo Molnar wrote:
> * Ingo Molnar <mingo@elte.hu> wrote:
> 
>> thanks Mathieu, i've picked this up into x86.git for more testing.
> 
> ... but had to drop it due to missing PARAVIRT support which broke the 
> build. I guess on paravirt we could just initially define 
> INTERRUPT_RETURN_NMI_SAFE to iret, etc.?

I figure that's what we'd have to do.  This is exactly the fundamental 
problem with paravirt - it relies on a different, an ill-defined, model 
of the platform than the (generally well-defined) hardware specification 
provides.


	-hpa