May 20, 2026 · Fundamentals

Mastering ramfs and tmpfs: Deep Dive into Linux’s High‑Speed In‑Memory Filesystems

This article explains the inner workings of Linux’s ramfs and tmpfs memory file systems, covering kernel page‑cache and shmem mechanisms, allocation and reclamation processes, size and inode limits, swap interaction, practical mounting commands, and suitable use‑cases compared with traditional disk‑based file systems.

IO performanceLinux kernelmemory file system

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Mastering ramfs and tmpfs: Deep Dive into Linux’s High‑Speed In‑Memory Filesystems

Liangxu Linux

Dec 11, 2023 · Fundamentals

How to Squeeze Extra RAM on a Resource‑Constrained Embedded Linux Device

This article examines memory usage on a Junzheng T31ZC embedded Linux board, breaks down physical and kernel allocations, and presents practical techniques—such as trimming kernel symbols, stripping ELF files, optimizing rootfs, and manually dropping caches—to reclaim valuable RAM without adding hardware.

LinuxMemory OptimizationRootFS

0 likes · 13 min read

How to Squeeze Extra RAM on a Resource‑Constrained Embedded Linux Device