Deep Dive into Linux VMA: Core Mechanisms of Virtual Memory Areas

Linux’s Virtual Memory Area (VMA) is the kernel’s core structure for managing a process’s address space, and this article explains its definition, key fields, linked‑list and red‑black‑tree organization, allocation, protection, page‑fault handling, copy‑on‑write, and practical usage examples.

Copy-on-WriteLinuxVMA

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Deep Dive into Linux VMA: Core Mechanisms of Virtual Memory Areas

Deepin Linux

Nov 9, 2023 · Fundamentals

Understanding Linux Memory Mapping (mmap): API, Implementation, and Use Cases

This article explains Linux memory mapping (mmap), covering its purpose, API parameters, different mapping types, internal kernel implementation, page‑fault handling, copy‑on‑write semantics, practical use cases, and includes a complete Objective‑C example demonstrating file mapping and manipulation.

Copy-on-WriteLinux kernelPage Fault

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Understanding Linux Memory Mapping (mmap): API, Implementation, and Use Cases

Bin's Tech Cabin

Oct 10, 2023 · Fundamentals

Deep Dive into Linux mmap: How the Kernel Allocates Virtual Memory

This article explains the Linux kernel's mmap implementation, covering how virtual memory is allocated, the role of get_unmapped_area, mmap_region, overcommit policies, VMA merging, and the underlying data structures such as mm_struct and vm_area_struct.

LinuxOvercommitVMA

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Deep Dive into Linux mmap: How the Kernel Allocates Virtual Memory