Priority inversion

Priority inversion is when a higher priority task has to wait for a lower priority task to finish before it can start. Think of it like a game of musical chairs - the higher priority person, who usually goes first, has to wait for the lower priority person to finish so they can get the chair they want. The higher priority person ends up waiting a long time and gets frustrated. Priority inversion happens in computers too, when a high priority task has to wait for a low priority task to finish before working on it.