Deepin Linux

Apr 27, 2026 · Fundamentals

Understanding the SLUB Memory Allocator: A Deep Dive into Linux Kernel Object Management

SLUB, the default Linux kernel memory allocator, reduces fragmentation and improves allocation speed for frequently created objects like task_struct and inode by using per‑CPU caches, object slabs, and NUMA‑aware node caches, with detailed structures, allocation/free paths, tuning parameters, and real‑world case studies.