Tagged articles

kernel module

13 articles · Page 1 of 1

Aug 26, 2026 · Cloud Native

Zombie Memcg Exhausting Node Memory? TencentOS's Cross-Kernel Fix

TencentOS analyzes zombie memcg root causes — page cache, shmem, and swap entries — reviews existing solutions' limitations, and proposes a dual-track approach: upstream patches for new kernels (obj_cgroup binding, swap entry fix) and a kernel module for old kernels that asynchronously reparents dying memcg pages and swap entries to online parents, preserving cache while enabling zero-restart deployment.

Linux kernelTencentOScloud-native

0 likes · 31 min read

Zombie Memcg Exhausting Node Memory? TencentOS's Cross-Kernel Fix

Deepin Linux

Jun 4, 2025 · Fundamentals

Understanding and Using Kprobes for Dynamic Kernel Debugging

This article explains the concept, architecture, key data structures, registration process, implementation details, limitations, configuration steps, and practical examples of using Kprobes to dynamically instrument and debug Linux kernel functions without recompiling or rebooting the system.

Kernel InstrumentationKprobesLinux kernel

0 likes · 25 min read

Understanding and Using Kprobes for Dynamic Kernel Debugging

Infra Learning Club

Mar 9, 2025 · Cloud Native

How to Fix nvidia-smi Missing GPU Process Info Inside Containers

The article explains why nvidia-smi cannot display GPU processes when run inside a container, analyzes the underlying pid‑namespace isolation and kernel‑level restrictions, and provides three practical solutions—including using hostPid, custom kernel interception modules, and the nvitop tool—plus a workaround for gpu‑operator deployments.

GPUHelmKubernetes

0 likes · 8 min read

How to Fix nvidia-smi Missing GPU Process Info Inside Containers

Infra Learning Club

Jan 20, 2025 · Fundamentals

How GPU Kernel Virtualization Works: A Deep Dive into the cgpu Project

This article explains the principles of GPU kernel virtualization by analyzing the cgpu project's source code, detailing kernel interception of device operations, the driver’s file_operations, module initialization and cleanup, procfs interfaces, scheduling logic, and compilation steps on Ubuntu 22.04.

GPU virtualizationLinux kernelcgpu

0 likes · 5 min read

How GPU Kernel Virtualization Works: A Deep Dive into the cgpu Project

Infra Learning Club

Jan 15, 2025 · Fundamentals

Getting Started with GPU Kernel Virtualization: Building a Simple Linux Module

This tutorial walks through the motivation for Nvidia GPU kernel interception, explains Linux kernel module basics and privilege rings, shows how to set up an Ubuntu environment, write and compile a minimal LKM, load and test it, then create a fake GPU character device and mount it into a Docker container for verification.

C++DockerGPU

0 likes · 8 min read

Getting Started with GPU Kernel Virtualization: Building a Simple Linux Module

Linux Kernel Journey

Sep 23, 2024 · Fundamentals

How Linux Kernel Maps Virtual to Physical Memory: Deep Dive into Page Table Paging Mechanism

This article traces the evolution from real‑mode segmentation to modern paging, explains segment and page‑table structures on x86 and ARM, dissects kernel macros such as PGDIR_SHIFT and PUD_SHIFT, and demonstrates a kernel module that translates a process's virtual address to its physical address.

LinuxPage TableVirtual Memory

0 likes · 24 min read

How Linux Kernel Maps Virtual to Physical Memory: Deep Dive into Page Table Paging Mechanism

Cloud Native Technology Community

Oct 27, 2022 · Cloud Native

Compiling and Installing the Kube-OVN FastPath Kernel Module for Enhanced Container Networking

This guide explains how to download, compile, and install the Kube-OVN FastPath kernel module on CentOS, showing steps for both 3.x and 4.x kernels, how to verify the installation with dmesg, and notes on module loading and removal.

FastPathKube-OVNLinux

0 likes · 4 min read

Compiling and Installing the Kube-OVN FastPath Kernel Module for Enhanced Container Networking

Liangxu Linux

Jul 22, 2022 · Fundamentals

How Linux Character Device Drivers Work: From Open Call to Kernel Integration

This guide explains what a Linux driver is, classifies character, block and network devices, walks through the open() system call flow from user space to the kernel’s VFS and driver list, and shows how to write, compile, and load a simple character device driver module.

LinuxVFScharacter device

0 likes · 20 min read

How Linux Character Device Drivers Work: From Open Call to Kernel Integration

21CTO

May 13, 2022 · Fundamentals

Why Nvidia’s Open‑Source GPU Driver Could Transform Linux and AI Development

Nvidia’s release of the open‑source R515 GPU driver for Linux, supporting data‑center and consumer GPUs under a dual GPL/MIT license, marks a pivotal shift that eases integration for AI/ML developers, gamers, and cloud users while fostering community‑driven improvements to driver quality and security.

AI/MLAmpereGPU Driver

0 likes · 7 min read

Why Nvidia’s Open‑Source GPU Driver Could Transform Linux and AI Development

21CTO

Nov 11, 2021 · Fundamentals

Why Write Linux Kernel Modules? A Step‑by‑Step Guide to Building Your First LKM

This tutorial explains why kernel modules are needed, walks through preparing a Linux environment, installing required headers, creating and compiling a simple "Hello, World" module, extending it to a character device driver, and shows how to load, test, and unload the module safely.

C ProgrammingLinuxMakefile

0 likes · 13 min read

Why Write Linux Kernel Modules? A Step‑by‑Step Guide to Building Your First LKM

OPPO Kernel Craftsman

Jun 18, 2021 · Operations

CPU Power Consumption, Low‑Power Modes, and Core Control Framework

CPU power consumption comprises static leakage and dynamic switching energy, so modern SoCs use low‑power C‑states and core‑control isolation to shut down idle cores, with the kernel’s corectl module dynamically evaluating load and task counts each scheduler tick to decide how many CPUs to activate or deactivate, configurable via sysfs.

CPU powerDynamic ScalingLow Power Mode

0 likes · 11 min read

CPU Power Consumption, Low‑Power Modes, and Core Control Framework

ITFLY8 Architecture Home

Sep 21, 2020 · Cloud Computing

How KVM and QEMU Work Together to Power Linux Virtualization

This article explains the KVM architecture, its interaction with QEMU, the step‑by‑step process of creating and running a virtual machine using ioctl calls, and the underlying source code structure that enables hardware‑assisted virtualization on Linux.

KVMLinux virtualizationQEMU

0 likes · 9 min read

How KVM and QEMU Work Together to Power Linux Virtualization

MaGe Linux Operations

Dec 13, 2018 · Operations

How to Hook Kernel Functions Safely on Modern Linux Systems

This article explains why traditional function‑hooking tricks fail on modern Linux due to executable‑memory protections, and presents a step‑by‑step method using page‑table remapping and the kernel's text_poke utilities to replace kernel functions safely, complete with code examples and a diagram.

function hookingkernelkernel module

0 likes · 10 min read

How to Hook Kernel Functions Safely on Modern Linux Systems