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Re: [Xen-devel] Questioning the Xen Design of the VMM

To: Al Boldi <a1426z@xxxxxxxxx>
Subject: Re: [Xen-devel] Questioning the Xen Design of the VMM
From: Harry Butterworth <harry@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
Date: Tue, 08 Aug 2006 10:17:13 +0100
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On Mon, 2006-08-07 at 18:01 +0300, Al Boldi wrote:
> Greetings!
> The Xen project caught my attention on LKML discussing hypervisors, so I took 
> a look at Xen and read the README, where it says:
>       This install tree contains source for a Linux 2.6 guest
> This immediately turned me off, as I hoped Xen would be a bit more 
> transparent, by simply exposing native hw tunneled thru some multiplexed Xen 
> patched host-kernel driver.
> I maybe missing something, but why should the Xen-design require the guest to 
> be patched?

Xen runs with high performance without binary translation on hardware
without virtualization support.  This requires patching the guest.

With hardware virtualization support Xen can run the guest unmodified.

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