memfd_create

Refining Core Development Skills

Dec 7, 2023 · Fundamentals

Understanding Linux Interprocess Shared Memory: memfd_create, mmap, and Unix Domain Socket Transfer

This article explains how Linux processes can share large data efficiently by creating a memory file with memfd_create, mapping it with mmap, and transferring the file descriptor over a Unix Domain Socket, while detailing the kernel mechanisms that enable true cross‑process memory sharing.