On 11/08/2010 06:02 PM, Andrew Cathrow wrote: > > > ----- Original Message ----- >> From: "Bill Davidsen"<davidsen@xxxxxxx> >> To: dlaor@xxxxxxxxxx >> Cc: xen@xxxxxxxxxxxxxxxxxxxxxxx, virt@xxxxxxxxxxxxxxxxxxxxxxx, "M A Young"<m.a.young@xxxxxxxxxxxx> >> Sent: Monday, November 8, 2010 11:52:08 AM >> Subject: Re: [fedora-virt] 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 -- xen mailing list xen@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/xen
