kernel.org tooling update from @monsieuricon

https://lore.kernel.org/all/20251209-roaring-hidden-alligator-068eea@lemur/

""These are the topics that were touched on at the [#Linux #kernel] maintainer summit […]

# What is the state of tooling?

## b4 development update

[…]

- Seeing lots of adoption and use across subsystem,

[…]

I spent a lot of time on trying to integrate AI into b4 workflows, but with little to show for it in the end due to lackluster results.

[…]

it was certainly ironic that one of the top challenges for us was to try to keep AI crawlers from overwhelming kernel.org infrastructure.

[…]

## Are we finally moving away from patches sent over email?

[…]

With lore and public-inbox, we *are* in the process of moving away from
relying on the increasingly unreliable SMTP layer.

[…]

## Work on "local lore"

[…]

## Other tools

### Bugzilla

It may be time to kill bugzilla:

[…]""

#LinuxKernel

Recordings from last week's @linuxplumbersconf 2025 are now available.🥳

You have two options to find the ones you might be interested in:

* Look through this YouTube-Playlist (https://www.youtube.com/playlist?list=PLVsQ_xZBEyN3-ZbrEgTiCpm1-Sg_ihLVF)

* Find and open interesting talks via the Schedule Overview (https://lpc.events/event/19/timetable/#all) or the Detailed Schedule (https://lpc.events/event/19/timetable/?view=lpc), as the individual talk descriptions link to the videos. And as a bonus, they besides the summary usually contain links to the slides shown, too.

#Linux #kernel #LinuxPlumbersConference #LinuxPlumbersConference2025 #eBPF #BPF

Wow, day 3 of @linuxplumbersconf has arrived quickly! Thanks to everyone involved in another great LPC 🗼🐧❤️

#Linux 6.18.y is now officially a longterm kernel series, as can be seen here:

https://www.kernel.org/category/releases.html

Projected EOL is Dec, 2027 (two years from now) – just like the 6.1.y series. All the other series as of now are scheduled for EOL in about one year from now – and 5.4.y just was EOLed, as planned (see https://social.kernel.org/objects/da258e20-22b9-4805-a9e5-5a506eb2bf91 and https://git.kernel.org/pub/scm/docs/kernel/website.git/commit/?id=0f52d79a5053091c95a269ff6fddbece27ea1d64 ).

Note, the kernel.org front page for the next ~two months (e.g. until 6.19 is out) will keep listing 6.18.y as latest stable series, as it might break peoples scripts to call it longterm there:

https://git.kernel.org/pub/scm/docs/kernel/website.git/commit/?id=b9ea3472ee1d973f4c27d075c7e4445afa7ade89

The @lwn article "The current state of #Linux architecture support" is now freely available:

https://lwn.net/Articles/1045363/

""There have been several recent announcements about Linux distributions changing the list of architectures they support, or adjusting how they build binaries for some versions of those architectures. […] Linux supports a large number of architectures, and it's not always clear where or by whom they are used. With increasing concerns about diminishing support for legacy architectures, it's a good time to look at the overall state of architecture support on Linux.

The 6.17 #kernel supports 21 different architectures […]""

#LinuxKernel

Wow! I only just realized that there is a 'nested' thread view on lore. I've been using the default 'flat' forever and randomly just clicked on 'nested'. So much better! :) https://lore.kernel.org/linux-riscv/37cfd941-f51d-44d8-8283-389ea8d53e69@codethink.co.uk/t/#mf12d1cd651f187f2558c14580056003899fe4876

Please donate to @conservancy if you can! They're doing great work keeping free software available to everyone.

https://sfconservancy.org/news/2025/nov/26/2025-fundraiser-launched-with-largest-match-yet/

When a kernel commit starts with "In A.D. 1582 Pope Gregory XIII found that ..." you know you're in for a ride:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f076ef44a44d02ed91543f820c14c2c7dff53716
tl;dr: Rockchip decided November should have 31 days...

If you ever wondered where do we stand in Linux kernel with DTS validation (dtbs_check) of various platforms, which architectures are fully compliant and where we see nice progress, please join my session on 9th of December in Tokyo during Open Source Summit Japan 2025: Status of DTS Validation in Linux Kernel
https://sched.co/29Foi

I will also have a shortened version at the Linux Plumbers Conference, just a few days after.

#OSSummit #OSSJapan2025 #LinuxPlumbers

#Linux #kernel explorer

https://reverser.dev/linux-kernel-explorer

""Chapter 1 — Understanding Linux Kernel Before Code

The kernel isn't a process—it's the system. It serves user processes, reacts to context, and enforces separation and control.

The Kernel Is Not a Process: It's the always-present authority bridging hardware and software.
Serving the Process: Orchestrates syscalls, interrupts, and scheduling to keep user tasks running.
System of Layers: Virtual, mapped, isolated, and controlled—structure at runtime.

📚 Study Files
init/main.c […]""

The Input Stack on Linux – An End-To-End Architecture Overview

https://venam.net/blog/unix/2025/11/27/input_devices_linux.html

Patrick Louis writes: ""Let’s explore and deobfuscate the input stack on #Linux. Our aim is to understand its components and what each does. Input handling can be divided into two parts, separated by a common layer:

#Kernel-level handling: It deals with what happens in the kernel and how events are exposed to user-space
[…]
Exposed layer (middle)
[…]
User-space handling:
[…]
The Widgets, #XServer, #X11 window managers, and #Wayland compositors, which rely on everything else

We’ll try to make sense of all this, one thing at a time, with a logical and coherent approach.""

#LinuxKernel #evdev

@ljs @ljs "This US experiment with 'what if we elect people with IQs much closer to the national average' is going brilliantly overall".... Ouch, but you're not wrong 🤣😨☠️

How big is lore.kernel.org? I counted 17,154,017 unique message-ids.

I think that's roughly how many emails @gregkh replies to every day.

The Life of a Packet in the #LinuxKernel

https://www.0xkato.xyz/life-of-a-packet-in-the-linux-kernel/

0xkato writes: ""A practical tour from write() to recv()

You run curl http://example.com and now you have some HTML in your terminal but what actually happened? Linux walks your bytes through a small set of well‑defined steps: pick a path, learn a neighbor’s MAC address, queue the packet, ask the NIC to send it, then reverse that on the other side.

This post tries to explain that path as simply as I can. If you’ve used #Linux, run curl, or poked at ip addr before, you’re qualified to read this. No deep #kernel background needed. […]""

If you had odd failures (like compilers or package manager aborting[1]) with #Linux 6.18-rc6 (and mainline snapshots a few days older and younger), then switch to latest mainline now, as it since about 12h contains a fix for the problem:

https://git.kernel.org/torvalds/c/5bebe8de19264946d398ead4e6c20c229454a552

[1] https://lore.kernel.org/lkml/20251117082023.90176-1-00107082@163.com/

#kernel #LinuxKernel

The company that provides LWN's health insurance just sent me a helpful thing about how a very small number of employees, those with expensive chronic conditions, drive the bulk of insurance claim costs.

We are far too small to have such a plan, but bigger companies pay their claim costs. As these companies lay people off, surely they wouldn't target the few employees that, we are being told, are the reason their health-insurance costs are going through the ceiling. The ones who most need the insurance they would stand to lose.

Right?

https://www.anthem.com/employer/the-benefits-guide/the-high-cost-reality-what-2024-trends-mean-for-self-funded-employers

The recording from the conversation between @torvalds and @dirkhh last week at #OSSummit Korea is online now:

https://www.youtube.com/watch?v=tWx769t1JKg

#Linux #LinuxKernel #kernel #OSSummitKorea

The recording from the "#Rust in the #Linux #Kernel, Why?" talk @gregkh gave last week at #OSSummit Korea is online now:

https://www.youtube.com/watch?v=HX0GH-YJbGw

Slides:

https://git.sr.ht/~gregkh/presentation-rust/blob/main/rust.pdf

#Linux #LinuxKernel #kernel #OSSummitKorea #RustLang

The recording from the "#Kernel CVEs are Alive, but Do Not Panic!" talk @gregkh gave last week at #OSSummit Korea is online now:

https://www.youtube.com/watch?v=dhu8HSOzxd8

Sides:

https://git.sr.ht/~gregkh/presentation-cve-is-dead/blob/master/cve-alive.pdf

#Linux #LinuxKernel #kernel #OSSummitKorea #CVE

Great post from Michał Wilczyński about their "journey into creating safe Rust abstractions for the kernel's PWM subsystem, demonstrated with a real world fan controller driver for the RISC-V TH1520 SoC"
https://mwilczynski.dev/posts/bringing-rust-to-the-pwm-subsystem/ #linuxkernel #linux #rust #rustforlinux #pwm #riscv