Hello World from a kernel thread
Nightingale shell
$ 
$ 
$ sh
Nightingale shell
$ cat /proc/3
Process 3
  name: "sh"
  parent: 2 ("sh")
  vm_root: 0x5b5000
  pgid: 3
  mmap_base: 0x700001000000
  signal_pending: 0
$ cat /proc/2
Process 2
  name: "sh"
  parent: 1 ("<init>")
  vm_root: 0x591000
  pgid: 2
  mmap_base: 0x700001000000
  signal_pending: 0
$