Interrupt Service Routine (ISR) in Linux Kernel | How ISRs Work in Linux Device Drivers

Welcome to Part 3 of the Linux Kernel Interrupt Handling Series!
In this video, we focus on Interrupt Service Routines (ISRs) — what they are, why they are important, and how they are implemented in the Linux Kernel.

👉 What you’ll learn in this video:

What is an Interrupt Service Routine (ISR)?

The role of ISRs in handling hardware interrupts

How Linux manages ISRs inside the kernel

Key concepts: registering an ISR, top halves, and immediate response handling

Practical use in Linux device driver development

Preview of next topics: bottom halves, SoftIRQs, and Tasklets

By the end of this session, you’ll understand exactly how Linux executes an ISR and why it’s a critical part of kernel responsiveness.

🎓 Want to go deeper into Linux Kernel Internals & Device Drivers?
Join my Live Online Linux Kernel Training Program here:

👉 Linux Kernel Internals Online Training : https://www.embeddedshiksha.com/courses/Linux-Kernel-Internals-Online-Live-Training-652b99dfe4b0ede0db752600

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Видео Interrupt Service Routine (ISR) in Linux Kernel | How ISRs Work in Linux Device Drivers канала EmbeddedShiksha