Writing a simple kernel module
Why do we need a kernel module? Sometimes we need to carry out some privileged
Linux x86 ring usage overview
In x86 protected mode, the CPU is always in one of 4 rings. The Linux
Kernel module – loading and removing
Kernel modules are pieces of code, that can be loaded and unloaded from kernel on
Mapped memory regions
A memory-mapped file is a segment of virtual memory that has been assigned a direct byte-for-byte correlation with some
/proc/map_files – Information about memory mapped files
This directory contains symbolic links which represent memory mapped files the process is maintaining. Example
KSM – What is it??
Kernel Samepage Merging (KSM) allows de-depulication of memory in Linux and has been released with kernel
Checking if Hugepages are enabled in Linux
Issue: On your Linux system, you want to check whether transparent hugepages are enabled on
How to crack a system Design Interview? – A step by step guide to System Design Interviews
I begin by saying that there is no single answer to this question. But what
Why is System Design Preparation needed ?
Recent interview process put a lot of emphasis on System Design. Good performance in System
Going through source code of libvirt
Clone the source code: git clone https://libvirt.org/git/libvirt.git The directory listing inside the repository is something