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

[Heiko Wundram <modelnine@xxxxxxxxxxxxx>]

Am 02.04.2012 13:33, schrieb Mario:
> On 04/02/2012 12:19 PM, Heiko Wundram wrote:
> > 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? :-)
Read my last paragraph again, please: Linux fully virtualized DomUs 
(which use the corresponding NIC and disk emulation as implemented by 
qemu) shouldn't perform any different than a Windows DomU, 
I/O-performance wise, as both of them use the same infrastructure in 
Dom0 to do I/O (qemu process). You're saying that they are different, 
I/O-wise, so: please be a little more concrete _what_ the problem is 
that you're seeing. We don't have crystal balls handy, sorry.
--
--- Heiko.

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