Low-Level Lore

Low-Level Lore

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August 2025

July 2025

Process Scheduling Impacts on Lock Contention in Multi-Server Distributed Systems
How Operating System Preemption Creates Hidden Performance Bottlenecks in Concurrent Applications
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Mohit
The Great DNS Blackout: A Technical Dissection of Cloudflare's 1.1.1.1 Global Outage on July 14, 2025
Infrastructure Collapse Through Configuration Cascades and BGP Route Withdrawal
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Mohit
Deconstructing Network Communication: How Your Simple JSON Request Traverses Seven Layers of the OSI Stack
A Engineer's Guide to Understanding Backend-to-Backend Data Flow Through the OSI Model
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Mohit
Database Join Algorithms: The Hidden Mechanics Behind SQL Query Execution
Exploring Nested Loop, Merge, and Hash Join Strategies Through Real-World Implementation Analysis
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Mohit
2
Linux Process and Thread Creation: System Call Architecture
Understanding the Unified Task Model in Modern Linux Kernels
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Mohit
The Addiction of Being Essential: A Programmer’s Wake-Up Call
How My Need to Be Needed Nearly Burned Me Out and What I’m Doing About It
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Mohit
6

June 2025

Swap Space in Linux: What It Is & How It Works
Linux Kernel Memory Management Explained: Swap Space Architecture, Virtual Memory Subsystems, and Performance Optimization Techniques
 • 
Mohit
𝐖𝐡𝐲 𝐔𝐬𝐞𝐫 𝐁𝐮𝐟𝐟𝐞𝐫𝐬 𝐀𝐫𝐞 𝐔𝐧𝐬𝐮𝐢𝐭𝐚𝐛𝐥𝐞 𝐟𝐨𝐫 𝐊𝐞𝐫𝐧𝐞𝐥 𝐨𝐫 𝐃𝐌𝐀 𝐔𝐬𝐞 𝐛𝐲 𝐃𝐞𝐟𝐚𝐮𝐥𝐭⁣
Why User Buffers Need Extra Care to Work with Kernel and DMA
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Mohit
How Does the Memory Management Unit (MMU) Work with the Unix/Linux Kernel?
Understanding how your CPU's MMU collaborates with the Linux kernel to create process isolation, memory protection, and the illusion of infinite RAM.
 • 
Mohit
1
Why You Can't Directly Move Data Between Two Memory Addresses in x86 Assembly and How to Do It
Understanding instruction encoding limitations and mastering efficient data movement techniques from single bytes to large blocks
 • 
Mohit
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