Open Source Linux

Sep 16, 2021 · Fundamentals

How Does Linux Shared Memory Work? A Deep Dive into shmget, shmat, and shmdt

This article explains Linux's shared‑memory mechanism, covering the concepts of virtual versus physical memory, the three core system calls (shmget, shmat, shmdt), example programs for two processes, and a detailed look at the kernel structures and functions that implement shared memory.