Re: [Xen-devel] VM Migration on ARM

[Vijay Kilari <vijay.kilari@xxxxxxxxx>]

Hi Andrew,

On Wed, Mar 25, 2015 at 9:32 PM, Andrew Cooper
<andrew.cooper3@xxxxxxxxxx> wrote:
> On 20/03/15 13:17, Vijay Kilari wrote:
>>
>> Hi Andrew,
>>
>> On Wed, Mar 11, 2015 at 4:21 PM, Andrew Cooper
>> <andrew.cooper3@xxxxxxxxxx>  wrote:
>>>
>>> On 11/03/15 05:32, Vijay Kilari wrote:
>>>>
>>>> Hi Andrew,
>>>>
>>>>      From Ian & Stefano, I came to know that you have introduced
>>>> Migration framework v2
>>>> under below patch series
>>>>
>>>> http://marc.info/?l=xen-devel&m=141036915311145
>>>>
>>>> I have few queries:
>>>>
>>>> 1) Is there any plans/timeline to support for ARM32/ARM64?.
>>>
>>> I will not personally be doing any ARM migration support, not even as
>>> part of getting migration v2 accepted upstream.
>>>
>>>> 2) Also does the Domain Image format specification for ARM is complete?
>>>
>>> The spec has certain sentinel values for ARM already where it made sense
>>> to just include them while writing.
>>>
>>> It has no specific thought to ARM migration, but an ARM virtual machine
>>> is exactly like an x86 HVM domain (from the toolstacks point of view),
>>> other than the Qemu record.  With any luck, no new additions to the spec
>>> will be needed, but the spec is trivially extendible if required.
>>
>> IMO, ARM uses PVH domain.
>> Can you please let me know how to use your patches, I mean xl/xc commands
>> to do migration (non-live/live) using your patches.
>> Any debugging and testing support information would be helpful.
>
>
> Hi - apologises for the late reply.  I have been on holiday.
>
> The patches series as available does make `xl save/restore/migrate` work,
> although the error handling leaves a lot to be desired.
>
> We (XenServer) are in the process of attempting to get everything upstream.
> The libxc side of things is definitely working and already shipped in
> XenServer 6.5 (We absolutely needed to support migrating between 32 and
> 64bit toolstacks, which was the primary reason for the rewrite).
>
> What sort of timescale are you looking for on this?  I hope to have a new
> series posted soon, now that the datacopier subseries has been accepted.
>

  I am looking for Xen 4.6 release. If not, atleast a prototype on
ARM64 would be
good enough. I would be grateful if you could provide your support on xl/xc
stuff for arm64. I can take care of other things.

Regards
Vijay

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