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Latest from Linux Kernel Journey

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Linux Kernel Journey

Mar 26, 2025 · Fundamentals

Efficient Memory Management: Paging Mechanism in x86‑64 Architecture

This article explains how the x86‑64 paging mechanism maps virtual addresses to physical memory, detailing the required protection‑mode conditions, page‑table structures, control‑register settings, various paging modes (32‑bit, PAE, 4‑level, 5‑level), and provides concrete kernel code examples and address‑translation demonstrations.

4-level-pagingLinux kernelPAE

0 likes · 40 min read

Efficient Memory Management: Paging Mechanism in x86‑64 Architecture

Linux Kernel Journey

Mar 23, 2025 · Fundamentals

Efficient Dynamic Memory Reclamation Techniques in Linux

The article provides an in‑depth technical analysis of Linux’s memory reclamation system, covering zones, watermarks, page flags, LRU lists, the shrink_zone workflow, kswapd, direct reclaim, OOM handling, page‑cache structures, and practical tuning tips for optimal performance.

LRULinuxPerformance Tuning

0 likes · 97 min read

Efficient Dynamic Memory Reclamation Techniques in Linux

Linux Kernel Journey

Mar 21, 2025 · Fundamentals

Breaking the Memory Bottleneck: Optimizing Resource Utilization with Memory Pools

The article explains how memory pools reduce allocation overhead and fragmentation by pre‑allocating large memory blocks, describes their implementation in C++ and the Linux kernel, compares various pool designs, and shows practical scenarios where pools improve performance and stability.

CLinux kernelPerformance

0 likes · 37 min read

Breaking the Memory Bottleneck: Optimizing Resource Utilization with Memory Pools

Linux Kernel Journey

Mar 17, 2025 · Fundamentals

How Linux Multicore Scheduling Unlocks CPU Potential

The article explains how Linux’s multicore scheduler distributes tasks across CPU cores, describes the core CFS and real‑time algorithms, details load‑balancing mechanisms such as pull/push and active/passive strategies, and discusses power, thermal, and algorithmic optimizations for servers and embedded devices.

CFSDVFSLinux

0 likes · 24 min read

How Linux Multicore Scheduling Unlocks CPU Potential

Linux Kernel Journey

Mar 14, 2025 · Fundamentals

Deep Dive into Linux Memory Optimization: Using Memory Barriers to Boost Performance

This article explains how Linux memory barriers work, why they are needed on SMP systems, the different barrier types, their kernel implementations, and practical examples showing their impact on multithreaded performance and driver development.

Cache CoherencyConcurrencyLinux

0 likes · 29 min read

Deep Dive into Linux Memory Optimization: Using Memory Barriers to Boost Performance

Linux Kernel Journey

Mar 11, 2025 · Operations

Essential eBPF Tracing Performance Tuning: What Every Developer Must Know

This article analyzes eBPF tracing hook mechanisms—kprobe, tracepoint/raw_tp, and fentry—explaining their implementation, performance trade‑offs, kernel version support, and benchmark results, to guide developers in choosing the most efficient hook for production workloads.

KprobePerformance OptimizationeBPF

0 likes · 5 min read

Essential eBPF Tracing Performance Tuning: What Every Developer Must Know

Linux Kernel Journey

Mar 8, 2025 · Backend Development

Optimizing MPTCP Flow Selection and Exploring a User‑Space MPTCP Stack – ByteDance STE at Netdev 0x19

At Netdev 0x19, ByteDance's STE team presented two technical talks: a NUMA‑aware MPTCP flow‑selection strategy that boosts Redis benchmark throughput by up to 30% and cuts tail latency by 6%, and a DPDK‑based user‑space MPTCP stack that halves latency and doubles throughput in data‑center tests.

DPDKLinux networkingMPTCP

0 likes · 8 min read

Optimizing MPTCP Flow Selection and Exploring a User‑Space MPTCP Stack – ByteDance STE at Netdev 0x19

Linux Kernel Journey

Mar 6, 2025 · Fundamentals

Master Disk I/O Basics: A Complete Primer

This article explains what disk I/O is, compares HDD and SSD characteristics, describes the Linux I/O stack, outlines performance metrics such as throughput, IOPS and latency, and reviews factors, tools, caching strategies, and RAID configurations that affect storage performance.

Disk I/OI/O toolsLinux storage

0 likes · 19 min read

Master Disk I/O Basics: A Complete Primer

Linux Kernel Journey

Mar 3, 2025 · Fundamentals

Understanding KVM Hyp Mode Memory Mapping Initialization

This article walks through the step‑by‑step initialization of KVM's hyp mode memory mapping on ARM64, covering EL2 register setup, identity mapping, page‑table allocation, stack preparation, and code section mappings required for a functional hypervisor environment.

ARM64EL2KVM

0 likes · 13 min read

Understanding KVM Hyp Mode Memory Mapping Initialization

Linux Kernel Journey

Feb 27, 2025 · Cloud Native

Designing FUSE: From Kernel VFS to Userspace and JuiceFS Performance

This article explains the evolution of file system architecture from kernel‑level VFS to userspace via FUSE, reviews the historical role of NFS, details JuiceFS's implementation on top of FUSE, and presents benchmark results that demonstrate its high throughput and practical limitations.

FUSEJuiceFSLinux kernel

0 likes · 15 min read

Designing FUSE: From Kernel VFS to Userspace and JuiceFS Performance