I honestly can’t tell if that’s an elaborate joke response or if that’s really something that works. If it does:

* How do you make sure you capture all mapped memory within a process? Walking something like /proc/self/maps?

* Does this include the stack and if so, doesn’t this cause havok when you write back. And if it doesn’t include the stack, can’t run things out of sync easily?

* This is then a page sized undo/redo, so it isn’t atomic with regards to actions triggered. Wouldn’t partially undoing such changes easily cause an invalid state?