I finally finished implementing my own memory allocation system and paging structure. I spent months doing that and now it was time for the long awaited ‘jump to the user-space‘ trick. What could go wrong? As usual, I went for the low-hanging fruits to pave the way to Ring 3…

About the x86–64 Troubleshooting Tales series x86–64 Troubleshooting Tales is this new side-project of mine in which I describe problems I faced while debugging issues on AlmeidaOS (my pet-project). The idea is very simple: I document symptoms observed and internal monologues I had while pulling my hair out in a desperate attempt of figuring things out. …

Introduction It doesn’t matter whether you are a novice developer or an expert one, debugging is the task that you will likely spend most of your time doing. Interestly, to my great surprise, very little focus is given by developers in terms of figuring out better ways to debug programs behaving…

Context I lost 3 weeks of my life trying to wrap my head around the Intel x86–64/AMD64 manuals to try implementing 4-Kbyte Page translation for my hobbyist OS. The purpose of this small blog post is to document some of the things that in the manual aren’t clear at all. …

One may argue that task scheduling is one of the most challenging problems to solve. Whether this is true remains to be seen but in this blog post, I will explain how Linux currently tackles this challenge. What is the scope of this blog post? In this blog post I will cover: some of the main problems that…

Irrespective of your opinion in the cloud vs on-premise debate, this is a question that all of us wondered at least once, whether this is because it’s so intriguing or due to disbelief (for whatever reason). Some solutions have been proposed to learn who might be hosting the website you…

One of my very short list of hobbies is digging into SDKs source-code to broaden my horizons of how certain things work under the hoods. It isn’t always a straightforward task to understand them at a glance, but once you get accustomed to reading git history logs as well as…

Let me guess, you tried installing Linux on your MacbookPro and realised that the CPU fan was running way too often and that 1 CPU core was consistently over 90% utilisation even though not many processes were running. …

Having been at the centre of numerous ML conversations in the past few years, leaders and experts in the Deep Learning field have come to the following consensus; Deep Learning (DL) is a subset of the Machine Learning (ML) research field which has arisen from the need to push the…