Re: [Qemu-devel] [PATCH 1/1] s390x/ais: for 2.10 stable: disable ais facility

[Christian Borntraeger]

On 09/21/2017 10:26 PM, Michael Roth wrote:
> Quoting Michael Roth (2017-09-21 11:50:28)
>> Quoting Cornelia Huck (2017-09-21 10:21:42)
>>> On Thu, 21 Sep 2017 17:14:46 +0200
>>> Christian Borntraeger <address@hidden> wrote:
>>>
>>>> The migration interface for ais was introduced with kernel 4.13
>>>> but the capability itself had been active since 4.12. As migration
>>>> support is considered necessary lets disable ais in the 2.10
>>>> stable version. A proper fix and re-enablement will be done
>>>> for qemu 2.11.
>>>
>>> Also now with qemu-devel on cc:
>>>
>>> So, should I apply to s390-next? Or can this be applied just to stable?
>>
>> Ideally we would get it in master or at least a branch that'll
>> eventually get pulled so we can reference the upstream commit ID.
>> It's not set in stone, but usually only patches specifically ported
>> to stable are applied directly.
> 
> Somehow I missed the "for 2.10 stable" in the subject line. I can apply
> this directly if it comes to that, but it seems safer to apply this
> upstream as well in the meantime, IMO. If the proper fix didn't make
> 2.11 for whatever reason we'd still be okay with 2.10.1<->2.11, for
> instance.
> 

So what about the following. We will schedule this disable patch also for
current master. Whenever we have a proper fix we can then revert/fixup the
disable patch. This patch will then be backported to 2.10.1
For 2.11 we then fixup the ais code and also add the "disable ais for compat
machines" patch.

Christian