Re: [Xen-devel] [PATCH] xen: Bump __XEN_LATEST_INTERFACE_VERSION__ to 0x00040700

[Razvan Cojocaru <rcojocaru@xxxxxxxxxxxxxxx>]

On 09/30/2015 06:34 PM, Jan Beulich wrote:
>>>> On 30.09.15 at 17:28, <rcojocaru@xxxxxxxxxxxxxxx> wrote:
>> On 09/30/2015 06:25 PM, Julien Grall wrote:
>>> Hi,
>>>
>>> On 30/09/15 16:16, Razvan Cojocaru wrote:
>>>> VM_EVENT_FLAG_SET_REGISTERS and xc_monitor_emulate_each_rep() are
>>>> not available in Xen 4.6, hence the bump.
>>>
>>> Shouldn't you bump XEN_DOMCTL_INTERFACE_VERSION and
>>> VM_EVENT_INTERFACE_VERSION instead?
>>>
>>> The former for xc_monitor_emulate_each_read as it's a DOMCTL and the
>>> latter for VM_EVENT_FLAG_SET_REGISTERS?
>>
>> Yes, judging also by Jan's previous comment that would appear to be the
>> preferred way to go.
> 
> I can't talk about VM_EVENT_INTERFACE_VERSION, but I also
> don't see any reason to bump XEN_DOMCTL_INTERFACE_VERSION
> with the given change. Again - it's just an addition to the interface,
> not an incompatible change.

The same is true for VM_EVENT_FLAG_SET_REGISTERS I'm afraid. Nothing at
all changes for existing vm_event users. In that case, I'll just leave
them all alone.

But the question still remains, if these markers are unreliable in my
case, could you please suggest another which I can check in my scenario?
__XEN_LATEST_INTERFACE_VERSION__ has been fine so far, but I now see
that this has only been a coincidence.


Thanks,
Razvan

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