What do you mean by kernel module?

What do you mean by kernel module?

Kernel modules are pieces of code that can be loaded and unloaded into the kernel upon demand. They extend the functionality of the kernel without the need to reboot the system. A module can be configured as built-in or loadable.

What are Linux modules used for?

There is an alternative, Linux allows you to dynamically load and unload components of the operating system as you need them. Linux modules are lumps of code that can be dynamically linked into the kernel at any point after the system has booted.

How are kernel modules loaded?

There are two ways that a kernel module can be loaded. The first way is to use the insmod command to manually insert the it into the kernel. The second, and much more clever way, is to load the module as it is needed; this is known as demand loading.

Why is Linux modular?

A modular kernel allows an administrator to add functionality only when required. Keeping only what is necessary in kernel memory reduces the kernel’s memory footprint and increases its overall performance. Each kernel module contains code to handle some necessary system functionality.

How does Linux load modules?

Loading a Module

1. To load a kernel module, run modprobe module_name as root .
2. By default, modprobe attempts to load the module from /lib/modules/kernel_version/kernel/drivers/ .
3. Some modules have dependencies, which are other kernel modules that must be loaded before the module in question can be loaded.

What is kernel object in Linux?

ko files) are object files that are used to extend the kernel of the Linux Distribution. They are used to provide drivers for new hardware like IoT expansion cards that have not been included in the Linux Distribution.

Whats is the relationship between kernel and drives?

In general, drivers provide detail implementation to specific physical or logical devices, while kernel then provide a set of interface for drivers, and manage them in a higher abstracted level (HAL). By the way, kernel does a lot more than managing hardware resources.