Understanding Linux Deadlocks: Spinlocks, Semaphores, and Built‑in Detection Mechanisms

The article explains what deadlocks are, compares spinlocks and semaphores, describes typical deadlock scenarios in the Linux kernel, and details the built‑in detection mechanisms such as hung‑task (D‑state) and soft‑lockup (R‑state) along with the NMI watchdog for long interrupt disabling.

LinuxSpinlockdeadlock

0 likes · 14 min read

Understanding Linux Deadlocks: Spinlocks, Semaphores, and Built‑in Detection Mechanisms

ITPUB

Aug 17, 2016 · Fundamentals

Understanding Linux Deadlocks: Spinlocks, Semaphores, and Built‑in Detection Mechanisms

This article explains how deadlocks arise in Linux kernels, compares spinlocks and semaphores, and details the kernel's built‑in D‑state, R‑state, and long‑interrupt‑disable detection mechanisms such as hung‑task, soft‑lockup, and NMI watchdog, including key code snippets.

LinuxSpinlockdeadlock

0 likes · 14 min read