Linux Device Driver Development with Raspberry Pi #4 - Linux Kernel Log Levels
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/prin...
All source code, Makefile, and shell commands used in this video are available on GitHub: https://github.com/madhawapolkotuwa/l...
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#linux #raspberrypi #kernel