----- Original Message -----
> From: "Bill Davidsen"<davidsen(a)tmr.com>
> To: dlaor(a)redhat.com
> Cc: xen(a)lists.fedoraproject.org, virt(a)lists.fedoraproject.org, "M A
Young"<m.a.young(a)durham.ac.uk>
> Sent: Monday, November 8, 2010 11:52:08 AM
> Subject: Re: [fedora-virt] [Fedora-xen] Dom0 xen support in Fedora 15?
> Dor Laor wrote:
>> On 11/08/2010 04:55 AM, M A Young wrote:
>>
>>> I am trying to work out whether it is practical to propose Dom0 xen
>>> support as a feature for Fedora 15.
>>>
>>> The kernel situation is that Domain 0 has been accepted upstream
>>> for
>>> 2.6.37. Assuming a 3 month kernel release cycle, F15 will most
>>> likely ship
>>> with a 2.6.37.x kernel, with 2.6.38 coming out either after the F15
>>> release or just before but too late to be included. If the plan to
>>> get key
>>> xen drivers into 2.6.38 succeeds, then F15 may be become usable as
>>> a
>>> Domain 0 system at some point during its lifetime as the kernel
>>> package in
>>> a Fedora version typically has one major update.
>>>
>>> If the kernel team accept backported patches then it might just be
>>> possible to ship F15 with usable Domain 0 support but the timescale
>>> for
>>> that would be very tight.
>>>
>>> The other thing we would need to consider is what needs to be done
>>> to make
>>> xen friendly enough to be usable by an ordinary user. The page
>>>
https://fedoraproject.org/wiki/Features/XenPvopsDom0 contains plans
>>> from
>>> when dom0 xen support was expected to make a quick return to
>>> Fedora, but
>>> they are a couple of years old now so probably need updating.
>>>
>>> I think as a minimum we would need a way to add a dom0 enabled grub
>>> entry
>>> for a kernel, rather than requiring the user to hand edit the grub
>>> file.
>>> We should also make sure that xen works with the other Fedora
>>> virtualisation tools.
>>>
>>> What do others think about this? For example is it achievable as a
>>> feature, is it too early and better to wait for F16, and what else
>>> should
>>> we aim to do to make xen usable in Fedora?
>>>
>> Have you consider kvm? it's upstream since 2.6.20 and now its more
>> ready
>> than ever.
>>
>
> There are some good tutorials which should explain the difference
> between xen and kvm, particularly the performance and hardware
> requirements of each.
re: hardware requirements, KVM's requirement for VT-X/AMD-V extensions certainly used
to be a concern 2-3 years ago but today even laptops come with this support.
And regarding performance they days of Xen outperforming KVM have long-since passed.
Citations needed. I'm not saying what you claim isn't true but without data
this opinion doesn't carry much weight.
Regards,
Dennis