# Tech News Digest – April 21, 2025 # Tech News Digest - 2025-04-21 > 📢 Deciphered From Crop Circles ## Kernel prepatch 6.15-rc3 **Category:** Linux **Tags:** Linux **Published:** Sun, 20 Apr 2025 23:27:49 +0000 **TL;DR:** The 6.15-rc3 kernel prepatch has been released, featuring a collection of small bug fixes scattered throughout the codebase with no major changes or notable features. According to the developer, there is nothing particularly significant in this release, just a routine set of minor patches. The 6.15-rc3 kernel prepatch is out for testing. "There's absolutely nothing of huge note here as far as I can tell. Just a fair number of small fixes all over the place". [Read more](https://lwn.net/Articles/1018193/) ## Three stable kernels **Category:** Linux **Tags:** Linux **Published:** Sun, 20 Apr 2025 13:39:28 +0000 **TL;DR:** Here is a 2-sentence summary: The Linux kernel has released three new stable versions: 6.14.3, 6.13.12, and 6.12.24, each containing important bug fixes. The 6.13.x series has reached its final version with 6.13.12, marking the end of that branch. The 6.14.3, 6.13.12, and 6.12.24 stable kernel updates have been released; each contains another set of important fixes. Note that the 6.13.x series ends with 6.13.12. [Read more](https://lwn.net/Articles/1018171/) ## EU OS: A European Proposal for a Public Sector Linux Desktop (The New Stack) **Category:** Linux **Tags:** General **Published:** Fri, 18 Apr 2025 15:37:42 +0000 **TL;DR:** Here is a 2-sentence summary: EU OS is a proof-of-concept desktop system designed for the European public sector, built on top of Fedora's KDE Plasma spin (Kinoite). The project takes a layered approach to customization, aiming to provide a standard Linux base that can be extended with national or regional customizations to meet the diverse needs of European public sector organizations. The New Stack looks at EU OS, an attempt to create a desktop system for the European public sector.

EU OS is not a brand-new Linux distribution in the traditional sense. Instead, it is a proof-of-concept built atop Fedora's immutable KDE Plasma spin (Kinoite). EU OS takes a layered approach to customization. The project's vision is to provide a standard, adaptable Linux base that can be extended with national, regional or sector-specific customizations, making it suitable for a wide range of European public sector needs.
[Read more](https://lwn.net/Articles/1018058/) ## [$] The problem of unnecessary readahead **Category:** Linux **Tags:** Linux **Published:** Fri, 18 Apr 2025 14:24:12 +0000 **TL;DR:** Here is a 2-sentence summary: The final session of the Linux Storage, Filesystem, Memory-Management, and BPF Summit was an impromptu talk by Kalesh Singh that discussed the kernel's readahead mechanism. While readahead generally improves performance by preloading data, it can sometimes go overboard, leading to issues. The final session in the memory-management track of the 2025 Linux Storage, Filesystem, Memory-Management, and BPF Summit was a brief, last-minute addition run by Kalesh Singh. The kernel's readahead mechanism is generally good for performance; it ensures that data is present by the time an application gets around to asking for it. Sometimes, though, readahead can go a little too far. [Read more](https://lwn.net/Articles/1016860/) ## [$] Tracepoints for the VFS? **Category:** Linux **Tags:** Linux **Published:** Fri, 18 Apr 2025 13:55:46 +0000 **TL;DR:** Here is a summary of the text in 2 sentences: The use of tracepoints in certain kernel subsystems, such as the virtual filesystem (VFS) layer, has been controversial due to concerns about breaking the user-space ABI. A recent discussion led by Ted Ts'o at the 2025 Linux Storage, Filesystem, Memory Management, and BPF Summit suggests that these concerns may be outweighed by the benefits of using tracepoints for debugging and development. Adding tracepoints to some kernel subsystems has been controversial—or disallowed—due to concerns about the user-space ABI that they might create. The virtual filesystem (VFS) layer has long been one of the subsystems that has not allowed any tracepoints, but that may be changing. At the 2025 Linux Storage, Filesystem, Memory Management, and BPF Summit (LSFMM+BPF), Ted Ts'o led a discussion about whether the ABI concerns are outweighed by the utility of tracepoints for the VFS. [Read more](https://lwn.net/Articles/1017573/)