🔧 Linux Kernel Deep Dive: Zombie Processes and Modern Process Management

Introduction


When you type ps aux, have you ever found the eerie letter "Z" in the STAT column?
Or have you ever encountered a "PID limit reached" error while investigating a CrashLoopBackOff on a Kubernetes Pod?

These are all the work of "Zombie Processes."
They consume neither memory nor CPU, but they cling to the precious resource known as a...