RE: [Xen-devel] single kernel for xen0 & xenU

["M.A. Williamson" <maw48@xxxxxxxxx>]

> That being true then, is there any particular reason why we have
> separate kernels?
Simply because (with default settings) the XenU kernel is 30% smaller.

> > There haven't been any API changes for some time.
>
> That's good to know.
After the 2.0 release, we'd seek to keep APIs / ABIs stable and just fix 
bugs or add minor features that don't tread on anything pre-existing.
> Do you have any opinion on how best to organise it? Currently I have 1
> iscsi target (running linux) and 2 xen physical hosts. The target
> currently exports lvm logical volumes which the xenU domains see as
> physical disks with a partition table etc. This works well within the
> domains but accessing them for maintenance outside is a right pain.
In principle, dom0 should be able to export VBDs to itself, then you could 
see the partitions inside. I don't know if this works at the moment but it 
seems doable... Anyone tried this?
> How do you import the partitions into Dom0 such that they can be
> exported into DomU? Do you run into problems if multiple physical
> machines see the same iscsi disks? What if multiple physical machines
> see the same volume group?
I'd import the iSCSI disks in dom0 and then export that device as if it 
were a physical device. i.e. if you've imported to dom0 as /dev/foobar then 
put export 'phy:/dev/foobar,/dev/target_dev,w' in the domain config file.
This could be automated using a shell script (as for file disks and nbd 
disks) if you feel like saving time, then you could just have 
'iscsi:host:whatever,/dev/target_dev,w'... There's examples under 
/etc/xen/scripts/ but we can help you out.
HTH,
Mark

> Thanks
>
> James
>
>
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