Sorry, I should have elaborated: with namespaces, each container instance gets its own process table with separate non-shareable pages (without KSM or other ded

Sorry, I should have elaborated: with namespaces, each container instance gets its own process table with separate non-shareable pages (without KSM or other dedup feature) and then each container process gets its own page tables, like they normally do. The point is that there's an extra level of isolation beyond just processes, although there is still the kernel attack surface.