Some folks in this subthread would benefit with re-acquanting themselves with some old OS research. I am specifically thinking of Opal [0] which differentiates

Some folks in this subthread would benefit with re-acquanting themselves with some old OS research. I am specifically thinking of Opal [0] which differentiates the various roles virtual memory management plays. In Opal, all tasks (processes) share a single 64 bit address space (so you can just share pointers) but hardware provides page-level protection. [0] https://homes.cs.washington.edu/~levy/opal/opal.html https://homes.cs.washington.edu/~levy/opal/opal.html