Re: [RFC PATCH 2/4] mm: Add support for unaccepted memory hotplug

[Borislav Petkov]

On Fri, Nov 28, 2025 at 10:30:15AM +0100, David Hildenbrand (Red Hat) wrote:
> kexecing the same kernel is typically used for kdump purposes.
> 
> kexecing different kernels is used for all sorts of things (live-upgrade,
> grub-emu come to mind). It's quite common to kexec different kernels, or
> maybe I misunderstood the question here?

And my question is: since when do we enforce no-ABI-changes between kernels so
that we can kexec any kernel into any kernel?

By that logic I should be able to kexec 5.x into 6.x. I'll bet some money that
it won't work.

So unless it is written down somewhere, I think we should probably talk first
what we want to support and why...

Makes sense?

-- 
Regards/Gruss,
    Boris.

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