Re: [Xen-devel] [PATCH] x86: wrap kexec feature with CONFIG_KEXEC

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 01.09.15 at 12:44, <andrew.cooper3@xxxxxxxxxx> wrote:
> On 01/09/15 11:36, Ian Campbell wrote:
>> In general (i.e. not 100% consistently, I think) we have tended to avoid
>> making things user-facing compile time options. Many of the existing
>> CONFIG_* and HAVE_* are really about things which are arch dependent, or
>> require specific porting to each arch etc. I think the KEXEC flag is one of
>> those.
>>
>> This keeps the test matrix more reasonable (unlike e.g. Linux's Kconfig)
>> and also helps us by ensuring that users are mostly running one of a small
>> number of possible configs.
>>
>> I slightly fear that after Kexec you are going to want to strip out more
>> and more stuff...
> 
> I for one welcome a Kconfig style approach.  We will never be in the
> same order of magnitude of options as Linux, and it will help to
> properly modularise the code.

Indeed the idea was brought up a few times already, and I would
also welcome such a step (accepting the downside of the larger
test matrix). Not the least considering the "no shadow mode" and
"big memory" build options that got introduced not so long ago.

Jan


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