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Kernel: BPF, Yocto Project, and More for Linux 5.13

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  • BPF: Application Development and libbpf

    A while back, I posted a blog series on BPF, including some suggestions about setting up a BPF development environment. Much has changed since then in terms of BPF features, so it's worth revisiting how BPF applications are developed now.

    The key change - at least for the BPF projects I work on - is that libbpf has become central to BPF application development. Why?

    The SYS_BPF syscall is the Swiss Army knife of BPF; it allows you to for example inject a BPF program into the kernel and verify it, create associated maps and attach the program to its target. When these basic tasks were all that was needed, they could be carried out using simple wrappers to the SYS_BPF system call.

    However BPF programs do a lot more now and there's a huge amount of interplay between userspace and kernel required to set up a program to run. libbpf solves a bunch of problems for you. I'll try and describe a few of them here.


  • [ANNOUNCEMENT] Yocto Project 3.3 (hardknott-25.0.0) is Released

    We are pleased to announce the Yocto Project 3.3 (hardknott-25.0.0) Release is now available for download.

  • Yocto Project 3.3 (hardknott-25.0.0) released

    Yocto Project, a system to build embedded Linux distributions, released version 3.3 "Hardknott". In this version all OE-Core recipes build reproducibly regardless of host distro/build location except golang recipes and ruby's docs package. There are many more new features, upgrades, and bug fixes. The release notes have more details. 


  • Intel Bus Lock Detection Merged For Linux 5.13 - Phoronix

    Intel's code for Linux kernel bus lock detection that works in conjunction with newer Intel CPUs has landed in the Linux kernel. 

    Last year Intel contributed split lock detection for Linux 5.7+ for finding out when an atomic instruction ends up spanning multiple cache lines. Those split locks can incur significant performance penalties and now that kernel code has been extended to cover bus lock detection too with Linux 5.13+ on recent Intel processors. 

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Dilution and Misuse of the "Linux" Brand

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today's howtos

  • How to install go1.19beta on Ubuntu 22.04 – NextGenTips

    In this tutorial, we are going to explore how to install go on Ubuntu 22.04 Golang is an open-source programming language that is easy to learn and use. It is built-in concurrency and has a robust standard library. It is reliable, builds fast, and efficient software that scales fast. Its concurrency mechanisms make it easy to write programs that get the most out of multicore and networked machines, while its novel-type systems enable flexible and modular program constructions. Go compiles quickly to machine code and has the convenience of garbage collection and the power of run-time reflection. In this guide, we are going to learn how to install golang 1.19beta on Ubuntu 22.04. Go 1.19beta1 is not yet released. There is so much work in progress with all the documentation.

  • molecule test: failed to connect to bus in systemd container - openQA bites

    Ansible Molecule is a project to help you test your ansible roles. I’m using molecule for automatically testing the ansible roles of geekoops.

  • How To Install MongoDB on AlmaLinux 9 - idroot

    In this tutorial, we will show you how to install MongoDB on AlmaLinux 9. For those of you who didn’t know, MongoDB is a high-performance, highly scalable document-oriented NoSQL database. Unlike in SQL databases where data is stored in rows and columns inside tables, in MongoDB, data is structured in JSON-like format inside records which are referred to as documents. The open-source attribute of MongoDB as a database software makes it an ideal candidate for almost any database-related project. This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo‘ to the commands to get root privileges. I will show you the step-by-step installation of the MongoDB NoSQL database on AlmaLinux 9. You can follow the same instructions for CentOS and Rocky Linux.

  • An introduction (and how-to) to Plugin Loader for the Steam Deck. - Invidious
  • Self-host a Ghost Blog With Traefik

    Ghost is a very popular open-source content management system. Started as an alternative to WordPress and it went on to become an alternative to Substack by focusing on membership and newsletter. The creators of Ghost offer managed Pro hosting but it may not fit everyone's budget. Alternatively, you can self-host it on your own cloud servers. On Linux handbook, we already have a guide on deploying Ghost with Docker in a reverse proxy setup. Instead of Ngnix reverse proxy, you can also use another software called Traefik with Docker. It is a popular open-source cloud-native application proxy, API Gateway, Edge-router, and more. I use Traefik to secure my websites using an SSL certificate obtained from Let's Encrypt. Once deployed, Traefik can automatically manage your certificates and their renewals. In this tutorial, I'll share the necessary steps for deploying a Ghost blog with Docker and Traefik.