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.

Linux kernelNUMASLUB

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

Bin's Tech Cabin

Apr 11, 2023 · Fundamentals

How Linux Kernel Builds Slab Caches: A Deep Dive into kmem_cache Creation

This article walks through the Linux kernel's slab allocator, explaining how kmem_cache and kmem_cache_node structures are created, how slab objects are laid out in memory, how the required number of pages is calculated, and how the allocator is bootstrapped to avoid circular dependencies.

Kernel DevelopmentLinux kernelkmem_cache

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How Linux Kernel Builds Slab Caches: A Deep Dive into kmem_cache Creation