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Refining Core Development Skills
Refining Core Development Skills
Mar 25, 2025 · Fundamentals

Understanding Linux Kernel Physical Memory Management and the memblock Allocator

Linux does not expose all physical memory to users; this article explains why the kernel reserves memory, detailing the early memblock allocator, crash kernel reservations, page structure overhead, and the handoff to the buddy system, illustrating how these mechanisms consume several hundred megabytes of RAM.

Crash KernelKernelMemBlock
0 likes · 15 min read
Understanding Linux Kernel Physical Memory Management and the memblock Allocator
Architect
Architect
Mar 1, 2016 · Databases

In-depth Overview of MySQL InnoDB Page Types, Compression, IO Subsystem, and Buffer Pool Management

This article provides a comprehensive technical overview of MySQL InnoDB's internal page structures—including compressed, system, external, encrypted, and R‑TREE pages—along with detailed explanations of the IO subsystem, double‑write buffer, temporary tablespaces, and buffer pool memory management mechanisms.

Database InternalsIO SubsystemInnoDB
0 likes · 25 min read
In-depth Overview of MySQL InnoDB Page Types, Compression, IO Subsystem, and Buffer Pool Management