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Kernel: F2FS, IGC, BTRFS, and Zink

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Linux
  • Linux 5.14 To Support F2FS Read-Only Feature - Phoronix

    With the Linux 5.14 cycle this summer the Flash-Friendly File-System (F2FS) should land its new "RO" feature read-only mode. 

    Queued up yesterday into the F2FS "dev" code for its kernel driver is the RO feature when marked in a file-system's superblock then allows bypassing the provisioning/reserve spaces and segment summary area (SSA). 

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  • Linux 5.14 To Bring Intel IGC Driver Support For AF_XDP Zero-Copy - Phoronix

    After Intel originally proposed zero-copy capability for the Linux kernel's AF_XDP high performance packet processing code years ago and implemented for their higher performance network hardware/drivers, with Linux 5.14 the common Intel "IGC" Gigabit Ethernet driver is set to introduce AF_XDP zero-copy support. 

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  • Authenticated hashes for btrfs (part 1)

    There was a request to provide authenticated hashes in btrfs, natively as one of the btrfs checksum algorithms. Sounds fun but there’s always more to it, even if this sounds easy to implement.

    Johaness T. at that time in SUSE sent the patchset adding the support for SHA256 [1] with a Labs conference paper, summarizing existing solutions and giving details about the proposed implementation and use cases.

    The first version of the patchset posted got some feedback, issues were found and some ideas suggested. Things have stalled a bit, but the feature is still very interesting and really not hard to implement. The support for additional checksums has provided enough support code to just plug in the new algorithm and enhance the existing interfaces to provide the key bytes. So until now I’ve assumed you know what an authenticated hash means, but for clarity and in simple terms: a checksum that depends on a key. The main point is that it’s impossible to generate the same checksum for given data without knowing the key, where impossible is used in the cryptographic-strength sense, there’s an almost zero probability doing that by chance and brute force attack is not practical.

  • Breaking

    I had planned to write more posts about some optimizations and whatever other cool stuff I’ve been working on.

    I had planned to make more zink-wip snapshots.

    I did shower; stop spamming frog emotes at me.

    But I also encountered a bug so bizarre, so infruating, so esoteric, that I need to take a bit of a victory lap now that I’ve successfully corralled it. So let’s get into a real, vintage SGC blog post like we used to have back when SGC was a good blog and dive into what it took to fix a bug that took me four full days to resolve.

    [...]

    Iteration on various fixes finally yielded a patch that was upstreamable; the crux of the problem here was that the stride of vertex attributes was being used to calculate the size of the region to map, but the stride only determines the number of bytes between elements, not their size. For example, if the stride was 4 bytes but the element was 8 bytes, the overrun would be 4 bytes for the last element. The solution was to calculate the offset of the last element being mapped, then add the size of the element using the attribute’s format block size, which guarantees that the last attribute won’t be truncated.

    Fuck that bug.

More in Tux Machines

digiKam 7.7.0 is released

After three months of active maintenance and another bug triage, the digiKam team is proud to present version 7.7.0 of its open source digital photo manager. See below the list of most important features coming with this release. Read more

Dilution and Misuse of the "Linux" Brand

Samsung, Red Hat to Work on Linux Drivers for Future Tech

The metaverse is expected to uproot system design as we know it, and Samsung is one of many hardware vendors re-imagining data center infrastructure in preparation for a parallel 3D world. Samsung is working on new memory technologies that provide faster bandwidth inside hardware for data to travel between CPUs, storage and other computing resources. The company also announced it was partnering with Red Hat to ensure these technologies have Linux compatibility. Read more

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.