Re: [Xen-users] HVM on 3.2 kernel hdd speed issue

[Mario <mario@xxxxxxxxxxxxxx>]

On 04/02/2012 12:19 PM, Heiko Wundram wrote:
> Am 02.04.2012 12:15, schrieb Mario:
> > Well this was not the case on 2.6.34 dom0 kernel, and since windows
> > HVM does not need PVonHVM, i dont understand why would linux domUs
> > need it?
> This has nothing to do with the Dom0-kernel - PVonHVM is an interface
> which exposes the PV infrastructure (i.e., para-virtualized disk and
> net) to fully virtualized guests. The Linux-kernel contains the
> respective DomU-side code since some time around 2.6.38 natively, and
> when using Xenified kernels, the corresponding infrastructure dates back
> to around 2.6.32 (IIRC).
>
> Windows, of course, does not natively support PVonHVM in any way (except
> when using corresponding drivers to enable that), so if you get
> excessively slower I/O-speeds on "fully" virtualized Linux DomUs than
> you do on Windows DomUs which _don't_ have the corresponding PV-drivers
> installed, something else is amiss here; it'd help if you could describe
> your setup in a little more detail.
Why are we still on PVonHVM subject? I do not want that, I want regular 
HVM to work with linux domU's the same way it works with windows domU's. 
I don't have the luxury to install custom drivers on some domU's, so 
there is no point in trying to force me to use PVonHVM because i can't.
So, anyone else please? :-)

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