[PATCH v13 7/7] x86/crash: add x86 crash hotplug support

[Borislav Petkov]

On Tue, Nov 01, 2022 at 10:45:00AM -0500, Eric DeVolder wrote:
> As I'm re-reading that message, I suspect now the preference is to just to
> strike this ifdiffery line in this file and have the code always present?
> 
> If the preference is actually for CRASH_HOTPLUG, then let me know.

Well, it is this part:

"But on a plain simple laptop or workstation which has CPU hotplug,
would it make sense for the crash ranges to get updated too when CPUs
are offlined?

If so, I think you want this code present there too, without a Kconfig
item."

IOW, if this thing doesn't make sense to have on the majority of
machines out there - and memory hotplug machines are not the majority -
then it should be behind a Kconfig item which is default off and gets
enabled only when the user selects crash and memory hotplug...

I'd say.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette