Re: [PATCH v4 1/2] xen: EXPERT clean-up and introduce UNSUPPORTED

[Jan Beulich <jbeulich@xxxxxxxx>]

On 26.01.2021 14:17, Ian Jackson wrote:
> Jan Beulich writes ("Re: [PATCH v4 1/2] xen: EXPERT clean-up and introduce 
> UNSUPPORTED"):
>> On 26.01.2021 12:17, Bertrand Marquis wrote:
>>> Maybe something we could explain more clearly in the UNSUPPORTED/EXPERT
>>> config parameters instead ?
>>> We could also make that more clear in the help of such parameters directly.
>>>
>>> I do not see how we could make that more clear directly in the prompt (as
>>> making it too long is not a good solution).
>>
>> My main request is that such tags be added only if there's
>> absolutely no ambiguity. Anything else (requiring longer
>> explanations in many cases) should be expressed in the help
>> text of the option, or in yet other ways (a referral to
>> SUPPORT.md comes to mind).
> 
> Is
> 
>>>>>> +        bool "Harden the branch predictor against aliasing attacks 
>>>>>> (disabling UNSUPPORTED)" if UNSUPPORTED
> 
> too long ?

It may be tolerable, but it is getting longish imo.

Jan