Re: [RFC PATCH v6 1/2] mm: guestmem: introduce guestmem library

[Matthew Wilcox]

On Mon, Sep 15, 2025 at 04:18:27PM +0000, Kalyazin, Nikita wrote:
> From: Nikita Kalyazin <kalyazin@xxxxxxxxxx>
> 
> Move MM-generic parts of guest_memfd from KVM to MM.  This allows other
> hypervisors to use guestmem code and enables UserfaultFD implementation
> for guest_memfd [1].  Previously it was not possible because KVM (and
> guest_memfd code) might be built as a module.

https://lore.kernel.org/kvm/Z0DOdTRAaK3whZKW@xxxxxxxxxxxxxxxxxxxx/
remains un-addressed.

ie this entire approach is garbage.  throw it away and start again.