Re: [Security] proactive defense: using read-only memory, RO/NXmodules

[Alan Cox]

> Nice! IMHO we need more of that. (If the readonly section gets big enough in 
> practice we could perhaps even mark it large-page in the future. It could serve as 
> an allocator to module code as well - that would probably be a speedup even for 
> modules.)

You ideally want one other thing to go with it. While a non-guest can't
support it the marking of pages "permanently and irrevocably" readonly in
a guest is something a hypedvisor can happily enforce and provide for the
lifetime of the guest.

Alan
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