DSU has always been an interesting field to me, and I've wondered why the idea of hotpatching systems while they're running has been so relatively underrated.

DSU has always been an interesting field to me, and I've wondered why the idea of hotpatching systems while they're running has been so relatively underrated. Related is application checkpointing, where you can freeze the state of a process (fds, sockets, pipes, sigmasks, open ttys, etc.) into binary images and overlay them back. Useful for all sorts of nifty cases. See CRIU for a Linux implementation: http://criu.org/Main_Page http://criu.org/Main_Page