In a multikernel, how would retyping work?  Obviously, the kernel cannot
allow untyped X to be used for page tables if user code on another core
might still have write access to it.  Would retyping involve some sort of
in-kernel concurrency?

Obviously, the clustered multikernel avoids this, but making applications
(as opposed to low-level libraries and services) work around kernel
limitations seems rather unappealing.

Sincerely,

Demi
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