Re: [Qemu-devel] kvm: virtio-net: saved image requires TUN_F_UFO support

[Jason Wang <jasowang@redhat.com>]

On 2017年11月08日 19:22, Jason Wang wrote:
>
>
> On 2017年11月08日 18:46, Paolo Bonzini wrote:
>> On 08/11/2017 09:21, Jason Wang wrote:
>>>
>>> On 2017年11月08日 17:05, Stefan Priebe - Profihost AG wrote:
>>>> Am 08.11.2017 um 08:54 schrieb Jason Wang:
>>>>> On 2017年11月08日 15:41, Stefan Priebe - Profihost AG wrote:
>>>>>> Hi Paolo,
>>>>>>
>>>>>> Am 06.11.2017 um 12:27 schrieb Paolo Bonzini:
>>>>>>> On 06/11/2017 12:09, Stefan Priebe - Profihost AG wrote:
>>>>>>>> HI Paolo,
>>>>>>>>
>>>>>>>> could this patchset be related?
>>>>>>> Uh oh, yes it should.  Jason, any ways to fix it?  I suppose we
>>>>>>> need to
>>>>>>> disable UFO in the newest machine types, but do we also have to do
>>>>>>> (software) UFO in vhost-net and QEMU for migration compatibility?
>>>>>> Any news on this?
>>>>>>
>>>>>> Greets,
>>>>> Since we probe UFO support, it will be disabled automatically on 
>>>>> device
>>>>> startup.
>>>>>
>>>>> For the issue of migration, I think the only way is trying to fix 
>>>>> it in
>>>>> kernel.
>>>> But 4.14 is around the corner and the patchset is already included.
>>>> Shouldn't this get fixed before 4.14 is released?
>>> We will try to seek a solution as soon as possible. If we can't catch
>>> 4.14, we will do it for stable for sure.
>> Jason, can you write to netdev and Cc Linus and me?
>>
>> Thanks,
>>
>> Paolo
>
> Paolo, see this https://www.spinics.net/lists/netdev/msg465454.html
>
> Just notice this today since I'm not on the cc list.
>
> Thanks
>
>

An update:

After some discussions on netdev, we will try to bring UFO back 
partially for just TAP. Willem promise to fix this. 4.14 is too late 
consider the fix is not trivial, it will go through stable tree.

Thanks