LOADABLE KERNEL MODULE Meaning and
Definition
-
A loadable kernel module (LKM) refers to a piece of executable code that can be dynamically loaded into the kernel of an operating system. It is a fundamental concept in modern operating systems that allows adding or removing functionality to the kernel without the need to reboot the entire system.
A loadable kernel module can be thought of as a software package that provides additional features or functionality to the kernel when necessary. It allows the operating system to be more modular and allows for easy customization and expansion. Users can develop or install modules that provide new drivers, file systems, or other kernel-level services, enhancing the capabilities of the operating system.
The process of loading a kernel module involves adding the module's code and data into the kernel's memory and linking it with existing kernel functions and services. Once loaded, the module can be utilized by the operating system and other applications, allowing them to access the module's functionality.
One of the crucial advantages of loadable kernel modules is their ability to be loaded and unloaded dynamically without requiring a system reboot. This flexibility allows system administrators to make changes to the kernel on the fly, adding or removing functionality as needed, without interrupting the operation of the entire system.
Loadable kernel modules are commonly used in Unix-like operating systems such as Linux, where they play a vital role in enhancing the flexibility, extensibility, and maintainability of the kernel.
