What Is Os Kernel May 2026

Hardware is asynchronous. The disk finishes reading. The network card receives a packet. The keyboard is pressed. The kernel must respond to these events in microseconds.

It promises the hardware: I will not let these unruly user processes touch you in ways that break you. It promises the processes: I will give you the illusion of owning the entire machine, so you do not have to know about each other. what is os kernel

When you call open() , read() , write() , fork() , you are not performing an action. You are making a to the sovereign circuit. And the kernel, if it is in a good mood, will grant it. Hardware is asynchronous