Implement an IRQ Interrupt Handler in a Linux Kernel Driver (Full Guide)
Interrupts are vital for real-time responsiveness in Linux kernel modules. Whether you’re writing drivers for GPIOs, network … Read more
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Core Kernel
Core Kernel
Powerfully Reboot Linux with a Kernel Module: Using emergency_restart API
Linux Kernel Modules are pieces of code that can be loaded into the Linux kernel to extend … Read more
Reading Information from Sysfs Files in Linux: A Complete C Program Tutorial
Sysfs is a virtual filesystem in Linux that provides information and control over kernel objects and devices. … Read more
Understanding Debug Levels for Linux Kernel PrintK: A Comprehensive Guide
In Linux kernel development, debugging is an essential process for identifying and fixing issues. The printk function … Read more
Understanding Linux Kernel likely and unlikely Macros: Optimization Insights
In Linux kernel development, performance optimization is crucial for ensuring efficient execution of code. The likely and … Read more
Understanding sysfs and USB: A Comprehensive Guide for Developers
In the world of Linux, sysfs and USB play crucial roles in system management and device interaction. … Read more
Solved: WARNING: irq-gic-v3.c gic_irq_domain_translate kernel messages
If your are working to port the kernel versions or port the kernels to different platforms, during … Read more
How to override the value of a property in DTS ?
With the continuation of our previous post, where we tried to understand the syntax of DTS files, … Read more
Understanding Linux Kernel GPIO API’s
Request the GPIO GPIOs must be allocated before use, though the current implementation does not enforce this … Read more
How to obtain kernel config.gz of Running Linux / Android Device ?
If we want to check what is the default kernel configuration our device is using, the Linux … Read more
How to print logs on Single Line using PrintK in Kernel ?
In Linux kernel or device drivers if you are using printk, by default every message we pass … Read more
Passing command line Arguments / Parameters to Linux kernel module
In Our previous post, “Writing first Linux kernel Module” We learned how to write a simple Linux … Read more
How to force panic Linux kernel intentionally ?
When you are working with Linux kernel internals or device driver programming, there are chances you see … Read more
How initrd is mounted by Linux kernel ?
Lets first try to understand what are the ways to mount the root file system, Altough the … Read more
Understanding : “kernel panic – not syncing – attempted to kill init”
When the kernel gets into a situation where it does not know how to proceed (most often … Read more
Kernel startup entry point / how Linux kernel boots
We will consider our hardware platform as ARM, so the kernel startup entry point code is at … Read more
Understanding Linux Device Tree Syntax (DTS)
DTB = Devicetree blob. Compact binary representation of the devicetree.DTC = Devicetree compiler. An open source tool … Read more
Join Linux kernel mailing lists (LKML)
LKML https://lkml.org/ is an unofficial Linux Kernel Mailing List archive. This mailing list is a rather high-volume … Read more
Compile and Install device-tree-compiler (DTC) On Ubuntu
If you want to install device-tree-compiler i.e. dtc command on Ubuntu, use following command, This command will … Read more
Compile DTS to DTB from Linux kernel and manually
Lets say, you have been trying to compile Linux kernel source code for Raspberry Pi following steps … Read more
What is Linux Out-Of-Memory OOM Killer
Major distribution kernels set the default value of /proc/sys/vm/overcommit_memory to zero, which means that processes can request … Read more
Avoid a process from being killed in case of Out of Memory
In our previous post, we understood “What is Out of Memory Killer ?” In this post, we … Read more
Insmod: ERROR: could not insert module hello.ko
We tried to write a simple class driver framework which will create a directory in /sys/class, we … Read more
Understanding Linux Kernel Version Numbering
The main Linux kernel versions comes from the Linux Torvald who is author of Linux kernel, from … Read more