Top on linux shows kernel threads (all the processes in square brackets), on BSD it doesn't show these afaik. A fresh debian install only lists a handfull of processes (all the expected ones, ssh, systemd, ntp, gettys etc) besides the 200+ kernel-threads.
Uh, ok then. I always thought that those were actually real kernel processes. What's the use of having top report those kernel threads? Is it possible to renice them?
