[$] Moving beyond fork() + exec()

Since the earliest days of Unix, two of the core process-oriented system calls have been fork(), which creates a child process as a copy of the parent, and exec(), which runs a new program in the place of the current one. In Linux kernels, those system calls are better known asclone() andexecve(), but the core functionality remains the same. While there is elegance to this process-creation model, there are shortcomings as well. A recentproposal from Li Chen to add "spawn templates" to the kernel will not be accepted in its current form, but it may point the way toward a new process-creation primitive in the future.