This article explains the Linux kernel’s buddy memory allocation algorithm, covering its core principles, data structures, allocation and free workflows, performance advantages and drawbacks, monitoring tools, tuning parameters, and real‑world use cases such as Kubernetes, embedded IoT devices, and real‑time operating systems.
This article provides a comprehensive overview of Linux memory management, detailing the roles and mechanisms of the early boot memory allocator, the memblock subsystem, the buddy allocator for physical pages, and the slab allocator for small objects, including their data structures, algorithms, and practical usage scenarios.
This article dissects the Linux kernel's page allocation mechanisms, explaining how alloc_pages() follows a fast‑path using low watermarks and falls back to a slow‑path that triggers kswapd, direct reclaim, and compaction, while also detailing the corresponding page‑freeing functions and their internal data structures.
This article provides an in‑depth overview of Linux memory management, covering the three primary allocators—bootmem, buddy, and slab—including their data structures, initialization, allocation and free mechanisms, code examples, and the role of memblock and zone watermarks.
This comprehensive guide walks through Linux memory management, explaining CPU memory access, virtual‑to‑physical address translation, page‑table structures, zone organization, the buddy and slab allocators, vmalloc, page‑fault handling, and the Contiguous Memory Allocator (CMA) with detailed code examples and diagrams.
This article provides a comprehensive guide to Linux memory management, covering memory fundamentals, address space layout, paging and segmentation, the buddy and slab allocation algorithms, kernel and user‑space memory pools, common pitfalls, and practical tools for monitoring and debugging memory usage.
Linux’s memory allocation mechanisms—Buddy for main memory and Slab/Slub for CPU cache—aim to maximize memory utilization, minimize fragmentation, and boost allocation efficiency, with detailed explanations of their structures, operation steps, and how to inspect them via /proc interfaces.
This article walks through Linux kernel physical memory allocation, explaining the hierarchy of allocation interfaces, the role of gfp_mask and ALLOC flags, the fast and slow allocation paths, memory watermarks, NUMA zone handling, and the complex fallback mechanisms including compaction, direct reclaim, and OOM, all illustrated with code snippets and diagrams.
This article provides an in‑depth overview of Linux memory architecture, including address spaces, segmentation and paging, memory allocation strategies such as the buddy and slab allocators, kernel and user‑space memory pools, DMA considerations, common pitfalls, and practical tools for monitoring and optimizing memory usage.
This comprehensive guide walks through Linux memory management, explaining CPU memory access, virtual‑to‑physical address translation, page‑table initialization, zone organization, the buddy allocator, slab allocator, vmalloc, page‑fault handling, and CMA, providing code examples and diagrams to form a complete understanding.
