Re: [Xen-users] xen 3.1 and 32bit guests in 64bit dom0

[Martin Goldstone <m.j.goldstone@xxxxxxxxxxxxxxx>]

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PV is faster than HVM, but HVM allows unmodified guest OSs, so it's not
a clear cut case for which is better.  PV has better performance, but if
you have to use a non-Xenified kernel, then I guess your hands are tied
(although apparently there is now some domU support in the standard
kernel according to kerneltrap.org).

As you've got hardware support, the only thing you need is to set the
config file and disk image up properly.  HVM domains boot just like
regular systems (they have a BIOS as well), and so require a boot loader
in the disk image (I use an image for the entire disk, I don't know if
you can split it up into different files for different partitions with
HVM), along with the kernel etc, and in the config file for the domain
you need to remove the initrd line, point the kernel line to the
hvmloader, change the builder to hvm and add the device modeller etc.
You can find an example in /etc/xen/xmexample.hvm in the standard Xen
install, or you could use RedHat's virt-manager/virt-install to
configure and install the domain.

Hope this helps,

Martin

Lorin wrote:
> On 7/26/07, Martin Goldstone <m.j.goldstone@xxxxxxxxxxxxxxx> wrote:
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>> 1st question:  Is the domU kernel actually a Xen kernel?  By the look of
>> that error, I'd guess that it isn't, especially as normally Xen kernels
>> have -xen in them somewhere, and yours ends in -smp.  You need to have a
>>  Xen kernel to do PV, or you have to use HVM.
> 
> It's not a Xen kernel but a plain old stock kernel on which I'm
> supposed to run the VM (application requirements ).
> I have VT support in the cores so HVM should be enabled from what I've
> read so far . Does it require anything else ?
> 
> Speaking of PV and HVM  the latter is better because it makes use of
> hardware support right ?
> 
>> 3rd question:  If Danilo Godec's suggestion about the NIC driver doesn't
>> work, could you give us some more details about your networking setup
>> (ie NIC make/model, Bonding, VLANs etc)?
> 
> Yeah, it was the bnx2 problem.
> 
> Thanks a lot!
> 
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