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Re: [Xen-devel] Xen domU support merged into upstream Linux

To: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Subject: Re: [Xen-devel] Xen domU support merged into upstream Linux
From: Jan Oravec <jan.oravec@xxxxxxx>
Date: Mon, 30 Jul 2007 17:40:53 +0200
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx, Mark Williamson <mark.williamson@xxxxxxxxxxxx>
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Hi Jeremy,

First, congratulations for merging into 2.6.23.

On Tue, 2007-07-24 at 17:15 -0700, Jeremy Fitzhardinge wrote:
> There is the open question of whether we want to support pure pv 64-bit,
> or if we should just go straight to a hybrid pv-hvm solution.  That is,
> run the guest in an hvm container as ring0, use hvm to intercept a lot
> of the boring operations, but keep using pv pagetables, etc.  How many
> people are using pre-HVM 64-bit guests?
> 

I tend to believe there are more pre-HVM 64-bit guests than 32-bit
guests. 64-bit CPUs are mainstream for a few years and 32-bit-only
server systems are getting old. Almost everyone I know with 64-bit CPUs
prefers to run 64-bit Linux over 32-bit.

So, I think it is worth to support pre-HVM 64-bit guests.


Cheers,

Jan

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