Re: [Xen-devel] [PATCH for-4.9] livepatch: Declare live patching as a supported feature

["Jan Beulich" <jbeulich@xxxxxxxx>]

>>> Julien Grall <julien.grall@xxxxxxx> 06/27/17 9:20 AM >>>
>On 06/27/2017 07:04 AM, Jan Beulich wrote:
>>>>> Andrew Cooper <andrew.cooper3@xxxxxxxxxx> 06/26/17 6:40 PM >>>
>>>> --- a/xen/common/Kconfig
>>>> +++ b/xen/common/Kconfig
>>>> @@ -226,7 +226,7 @@ config CRYPTO
>>>>    bool
>>>>   
>>>>   config LIVEPATCH
>>>> -  bool "Live patching support (TECH PREVIEW)"
>>>> +  bool "Live patching support"
>>>>    default n
>>>
>>> This default should flip as well.
>> 
>> For unstable maybe. But please not for 4.9 - people shouldn't be caught by
>> surprise after 9 RCs that a config option's default changes. Furthermore, if
>> we default it to y, will there be much of a difference to simply removing the
>> config option?
>
>I think we should allow user to disable livepatch at build time. I have 
>mind any people looking at using Xen in constraint environment and 
>require some certifications. They will likely want to disable some part 
>of the Xen.

The at least I'd like to see it gain an EXPERT dependency. For now our
overall goal still is to limit the number of possible different configurations.

Jan


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