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Re: [Xen-devel] 4.3 Planning: Taking stock

On 24/01/13 11:16, Daniel Kiper wrote:
On Wed, Jan 23, 2013 at 05:00:26PM +0000, Jan Beulich wrote:
On 23.01.13 at 17:52, George Dunlap <George.Dunlap@xxxxxxxxxxxxx> wrote:
* Xen EFI feature: dom0 able to make use of EFI run-time services

Daniel Kiper is already working on this, but has just started.  The issue
(as I understand it) is that if there are systems where the ACPI tables are
only discoverable via EFI, then Xen+pvops will not be able to boot if pvops
doesn't have EFI run-time support.  The following version of Xen won't come
out until probably Q2 2014, and won't hit distros probably until 6 months
after that.

Given that, what do we think is the likelihood of such systems cropping up
in that timeframe?  If the answer is anything other than "very low", I
think that as a strategic measure, this one is probably important enough to
slip the schedule a little bit if necessary.
Except that this ought to be marked (external) in the first place:
The hypervisor support is all there (otherwise our kernels wouldn't
have been successfully booting on EFI for well over a year), and
hence this work shouldn't really have any impact on the schedule.

The one feature here that requires work in our tree is to be able
to boot via grub.efi (irrespective of how little I personally like that);
I'm not sure Daniel was also planning to look into that part.
I am going to do all work which is needed to run Xen + upstream Linux
Kernel on EFI enabled platform. I am going to look at GRUB2 too (as
stated eariler). I hope that this does not require a lot of work and
relevant patches could be ready before 4.3 feature freeze.

Great! If you could prioritize Xen booting under grub2.efi, it seems like that would benefit the xen.org project overall.

Shall I put you down as owner for "Xen on grub.efi", and mark it as "Fair" (given that you don't yet know how much work it will be)?


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