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In this video, we explore kernel log levels in Linux kernel modules. We cover: * Using printk with KERN_ macros (KERN_ALERT, KERN_ERR, KERN_INFO, etc.) * pr_info, pr_err, pr_alert, and other convenient alias functions * Viewing and filtering kernel messages with dmesg -w and dmesg --level * Adding module parameters (int, bool, string, and arrays) using module_param() and module_param_array() * Setting parameter descriptions with MODULE_PARM_DESC * Printing parameter values during module initialization Reference page: https://docs.kernel.org/core-api/printk-basics.html All source code, Makefile, and shell commands used in this video are available on GitHub: https://github.com/madhawapolkotuwa/linux_driver_development_with_raspberrypi Buy me a Coffee : https://buymeacoffee.com/madhawapolb #linux #raspberrypi #kernel
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