Comment by Blikkentrekker

I always felt that the way to create new processes and new threads should initially start the same. A new process is simply a thread that after creation does a syscall to isolate itself from the other thread and receive a unique copy of all resources.

This could also solve the issue with forking from multithreaded programs since we can ensure we own all shared resources when we isolate our thread, to effectively thus become a new process.

So instead of fork we have clone/isolate.

A new thread can also of course immediately suspend itself, allow other threads to work on it's data in some way, who then give it a signal to resume itself and then execute if need be.