In general, you definitely want to use PV-based kernels for Linux or any
operating system that supports it (Linux, Solaris, *BSD). However, there are a
few scenarios where you may not be able to run a PV kernel and may actually
need to install HVM, even for an O/S that supports PV. The primary example I
can think of is that you have a proprietary kernel module (for a piece of
hardware or a software application) that is not compiled for Xen-enabled
kernels. In this scenario, you're forced to run a kernel that is not
Xen-aware, but you want to accelerate as many of the devices in the HVM as
possible, mainly network and disk devices.
-Nick
>>> On 2010/09/04 at 17:29, Markus Schuster <ml@xxxxxxxxxxxxxxxxxxxx> wrote:
> Hi list,
>
> I've read about recent efforts to push pv-on-hvm drivers to Linux mainline
> and I'm curious to know the cause for this. What's the advantage over using
> pv_ops directly and booting the kernel paravirtualized?
> Are there plans to move Linux domUs closer to the KVM way (from an
> architectural point of view)?
>
> Hope you can help.
>
> Regards,
> Markus
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