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In this video, we explore asynchronous notification using fasync in Linux device driver development with Raspberry Pi. So far in the series, we covered blocking I/O, wait queues, and poll/select mechanisms, where the process waits for data. In this video, we take it a step further and implement signal-driven I/O, where the process continues running and gets notified via SIGIO signals when data is available. We walk through: * How fasync works in the Linux kernel * Implementing .fasync in the driver * Using fasync_helper and managing the async queue * Sending signals from the kernel using kill_fasync * Writing a user-space application to handle SIGIO * Enabling async mode using fcntl * Understanding how true asynchronous I/O works without blocking By the end of this video, you will clearly understand how to implement non-blocking, signal-based communication between kernel space and user space. GitHub : https://github.com/madhawapolkotuwa/linux_driver_development_with_raspberrypi Let's Connect ====================== Buy me a Coffee : ☕https://buymeacoffee.com/madhawapolb Patreon : https://patreon.com/MadhawaPolkotuwa #linux #kernel #devicedriver
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