Not to mention it costs $3000 .... On Mon, Nov 8, 2010 at 2:29 PM, Andrew Cathrow <acath...@redhat.com> wrote:
> > > ----- Original Message ----- > > From: "Dennis Jacobfeuerborn" <denni...@conversis.de> > > To: "Andrew Cathrow" <acath...@redhat.com> > > Cc: "Bill Davidsen" <david...@tmr.com>, xen@lists.fedoraproject.org, > v...@lists.fedoraproject.org, "M A Young" > > <m.a.yo...@durham.ac.uk> > > Sent: Monday, November 8, 2010 1:59:54 PM > > Subject: Re: [fedora-virt] [Fedora-xen] Dom0 xen support in Fedora 15? > > On 11/08/2010 06:02 PM, Andrew Cathrow wrote: > > > > > > > > > ----- Original Message ----- > > >> From: "Bill Davidsen"<david...@tmr.com> > > >> To: dl...@redhat.com > > >> Cc: xen@lists.fedoraproject.org, v...@lists.fedoraproject.org, "M A > > >> Young"<m.a.yo...@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. > > > > Citations are really needed on both sides of the debate, 2 or 3 year old > metrics no longer apply. > Vendors published benchmarks are typically questionable, they focus on > their products strengths and their competitors weakness. > The only hope for a fair comparison is a vendor neutral set of benchmarks > such as SPECvirt http://www.spec.org/virt_sc2010/ > But obviously this isn't a simple test to run. > > > > Regards, > > Dennis > -- > xen mailing list > xen@lists.fedoraproject.org > https://admin.fedoraproject.org/mailman/listinfo/xen > -- Dave Costakos mailto:david.costa...@gmail.com
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