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Re: [Xen-devel] [PATCH 0 of 12] PV on HVM Xen

To: Boris Derzhavets <bderzhavets@xxxxxxxxx>
Subject: Re: [Xen-devel] [PATCH 0 of 12] PV on HVM Xen
From: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
Date: Fri, 28 May 2010 12:06:16 +0100
Cc: Jeremy Fitzhardinge <jeremy@xxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Don Dutile <ddutile@xxxxxxxxxx>, Sheng Yang <sheng@xxxxxxxxxxxxxxx>, Stefano Stabellini <Stefano.Stabellini@xxxxxxxxxxxxx>
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On Fri, 28 May 2010, Boris Derzhavets wrote:
> What is an advantage of PV on HVM ?
> Kernel 2.6.34 with Stefano's patches may be built i believe only on Linux HVM 
> DomU.
> At the same time any recent Linux ( >=24 or >=26) supports PV guest install ( 
> it's in
> mainline for a while).
> What i am missing here ?
> 

A PV on HVM kernel doesn't need to be a special kernel: your pvops
kernel that can be used as native kernel or PV kernel can also be used
as PV on HVM kernel just adding CONFIG_XEN_PLATFORM_PCI.

PV on HVM support is good mainly for performances of 64 bit guests and
simplicity of installation.

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