A comprehensive guide to understanding deadlock in operating systems. This post defines deadlock, demonstrates how to model it using resource allocation graphs and state transitions, and covers various detection algorithms for both general and single-unit resources. It also explains dynamic deadlock avoidance, specifically the Banker's Algorithm, and effective strategies for deadlock prevention by breaking necessary conditions like hold-and-wait and circular wait.
2020
Understanding and Handling Deadlock in Operating Systems
January 2, 2020
2019
Operating System Concurrency, Semaphores, and Monitors Explained
December 29, 2019
An in-depth explanation of concurrency issues in operating systems, focusing on critical sections and the requirements for synchronization solutions (mutual exclusion, deadlock avoidance, starvation prevention). The post explores process competition and cooperation (like the Producer-Consumer problem) and detailed mechanisms to resolve these issues, including hardware-level atomic operations, binary and general semaphores, busy waiting vs. blocking, and high-level synchronization constructs like Monitors and condition variables.