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Linux Memory Management Part II

This content delves into Linux Kernel memory management, focusing on memory allocation mechanisms, specifically free lists and the introduction of the slab allocator. It explains how the slab allocator centralizes memory management to improve efficiency, addressing challenges like fragmentation and memory scarcity through a structured caching system and a buddy allocator for physical memory management.

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Linux Memory Management Part I

The blog explores memory management in the Linux kernel, detailing how it organizes physical memory into pages and various memory zones for efficient hardware interaction. Understanding these concepts aids developers in diagnosing performance issues, interpreting memory conditions, and optimizing application interaction with the operating system, enhancing overall system performance.

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How to Replace WiFi Driver on STM32MP1 Using Buildroot

Upgrade your STM32MP1's WiFi driver effortlessly with this comprehensive guide. Learn how to replace the outdated driver with an updated NXP version using Buildroot. Discover step-by-step instructions for obtaining the NXP WiFi driver source code, configuring it for your target, and integrating it into Buildroot. With clear explanations and helpful tips, this blog post simplifies the process, ensuring smooth implementation. Get ready to enjoy improved performance with your newly compiled NXP WiFi kernel module!

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How to install virtualenv on Ubuntu 18.04

virtualenv creates a virtual python environment inside a project folder of your choice. This enables your to install python packages within the virtual python environment without even having any admin rights on that particular machine. This makes the environment extremely flexible for developers.

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Guide to FONA Module Setup and Troubleshooting

Unlock seamless connectivity with our comprehensive guide to setting up your FONA module on the SPRESENSE using the Arduino FONA library. This blog post dives into troubleshooting tips for when your serial prompt stalls at “#updater,” a common sign that your firmware needs an update. Whether you're a seasoned developer or a maker just starting out, follow our step-by-step instructions to flash, update, and optimise your setup for reliable performance and enhanced project success.

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Resolving GobiSerial Module Errors on Raspberry Pi

Encountering 'Unknown Symbol' errors while loading the GobiSerial module on Raspberry Pi? This in-depth guide walks you through debugging missing kernel symbols, manually loading required modules, and properly configuring dependencies using depmod and modprobe for a clean and persistent fix. Learn how to resolve LTE driver issues with Sierra Wireless EM7565 on RPi effortlessly!

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How to Set Up Raspberry Pi with NOOBS

The article outlines the process of cross-compiling a kernel driver for Raspberry Pi 3 on Ubuntu. It details steps including determining the correct kernel version, downloading the necessary toolchain, compiling the driver, and resolving issues related to module format errors. Ultimately, it demonstrates successfully loading the GobiNet driver on the Raspberry Pi.

GitHub is a reliable and user-friendly platform for hosting repositories, offering free public repositories with optional private ones. Users can create repositories, initialize README files, and manage projects using TortoiseGit, a Windows-integrated client. After committing local changes, users can push updates to GitHub, ensuring their code is accessible and backed up online.

This post explains how to create a userspace C program as a Buildroot package that tests an existing kernel module. It details steps including creating package directories and files, defining dependencies, and populating configuration files. The process includes setting installation commands and proper source code structure for successful compilation and deployment.

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How to add/compile a kernel module as a new buildroot package

The content explains how to integrate an external kernel device driver as a new package in the Buildroot system, named "xyz." It involves creating a directory for the package and two essential files, Config.in and xyz.mk, which define package configuration and build instructions. The Config.in file sets up package options, while xyz.mk specifies module version, site, license, and build commands. Modifications are required in the main Buildroot Config.in file to include the new package, making it visible in the menuconfig. Finally, it outlines necessary adjustments in the source code's top-level Makefile for successful integration.

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How to run an external program from a python script

This is a demonstration how a python script can be used to automate the running of an external program which takes data file as input. The data file can be spread over differnet folders in the machine. The script goes to the data file location, extracts the name of each file in the folder and then passes the data file to the external binary.

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Efficient Source Code Management Using Vim and Cscope

The author emphasizes that Vim, especially when used with Cscope and Ctags, is invaluable for navigating large Linux codebases. A guide is provided with steps for effective setup, including database location, exclusion of unnecessary directories, and enabling Cscope navigation in Vim. The focus is on enhancing developer productivity and code management.