From mboxrd@z Thu Jan  1 00:00:00 1970
From: Avi Kivity <avi@redhat.com>
Subject: Re: [RFC PATCH 0/3] generic hypercall support
Date: Fri, 08 May 2009 10:55:37 +0300
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Cc: Gregory Haskins <ghaskins@novell.com>,
	Chris Wright <chrisw@sous-sol.org>,
	Gregory Haskins <gregory.haskins@gmail.com>,
	linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
	Anthony Liguori <anthony@codemonkey.ws>
To: Marcelo Tosatti <mtosatti@redhat.com>
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Marcelo Tosatti wrote:
> Also it would be interesting to see the MMIO comparison with EPT/NPT,
> it probably sucks much less than what you're seeing.
>   

Why would NPT improve mmio?  If anything, it would be worse, since the 
processor has to do the nested walk.

Of course, these are newer machines, so the absolute results as well as 
the difference will be smaller.

-- 
Do not meddle in the internals of kernels, for they are subtle and quick to panic.