Recent content on donaldh.wtf

 
This Week
 
 
 
I am neck deep in Agentic AI frameworks and contemplating the AAuth protocol draft as a solution
for agent identity. 
 
For recreation I am hoping to make more time to work through Alice's Adventures in a
Differentiable Wonderland . 
 
 
 
 
Recently
 
 
 
I have been getting a lot of mileage out of…

The mid-nineties was an exceptional time for British music. Portishead's Dummy is a perfect
example.

A report of features and offloads implemented by ethernet drivers in Linux kernel 7.1.

Dusting off the TVR and giving it a much needed overhaul to make it roadworthy again.

A report of features and offloads implemented by ethernet drivers in Linux kernel 7.0.

A report of features and offloads implemented by ethernet drivers in Linux kernel 6.19.

This is a solution to Advent of Code 2025 day 12, written in Raku.

This is a solution to Advent of Code 2025 day 11, written in Raku.

This is a solution to Advent of Code 2025 day 10, written in Raku.

This is a solution to Advent of Code 2025 day 9, written in Raku.

This is a solution to Advent of Code 2025 day 8, written in Raku.

This is a solution to Advent of Code 2025 day 7, written in Raku.

This is a solution to Advent of Code 2025 day 6, written in Raku.

This is a solution to Advent of Code 2025 day 5, written in Raku.

This is a solution to Advent of Code 2025 day 4, written in Raku.

This is a solution to Advent of Code 2025 day 3, written in Raku.

This is a solution to Advent of Code 2025 day 2, written in Raku.

This is a solution to Advent of Code 2025 day 1, written in Raku.

A report of features and offloads implemented by ethernet drivers in Linux kernel 6.18.

 Org mode is an Emacs major mode with a laundry-list of powerful features, one of which is Org
Babel , the literate programming engine that is embedded within Org mode. Think of it as the polyglot
 jupyter notebook of Emacs, if you will.

The topic for this month's Emacs Carnival is An ode to Org Babel and is an opportunity to
shine a light on the literate programming engine embedded in Org mode.

A report of features and offloads implemented by ethernet drivers in Linux kernel 6.17.

Demonstrating 4 nifty ways that bpftrace can be used to report SKB drops in the Linux kernel
networking data path.

This is a somewhat opinionated minimal set of customisations for Emacs when running on macOS
that give me a good baseline quality of experience.

Streamlining image capture while blogging in Emacs.

A report of features and offloads implemented by ethernet drivers in Linux kernel 6.16.

TIL that I can use display-buffer-alist to define a custom placement behaviour for specific
buffers.

A veteran software engineer working at Red Hat where I explore and evangelise emerging
technologies, with a focus on all things security. 
 
I am currently the Security Team Lead in the Office of the CTO, Emerging Technologies team. 
 
I write articles for the Red Hat Developer blog when I can: 
 
 eBPF application development: Beyond the basics 
 Why you…

TIL that M-y runs yank-from-kill-ring if used after any other command than a yank. Amazed that I
have used Emacs for decades without learning this.

A report of features and offloads implemented by ethernet drivers in Linux kernel 6.15.

Emacs performance problems in python-mode when using project-rootfile and TRAMP. Updated on
May 24, 2025 to wrap up the saga.

A report of features and offloads implemented by ethernet drivers in Linux kernel 6.14.

Figuring out how to make Eglot work with nested projects in Emacs. Updated on May 24, 2025 to
steer people towards project-vc-extra-root-markers instead.

A quick rundown of how I do Linux kernel development in Emacs.

Discovering the Magit references buffer that has been hiding in plain sight.

Investigating an issue where Emacs freezes when viewing some Linux kernel source files.

A report of features and offloads implemented by ethernet drivers in Linux kernel 6.13.

This is a solution to Advent of Code 2024 day 12, written in Raku.

This is a solution to Advent of Code 2024 day 11, written in Raku.

This is a solution to Advent of Code 2024 day 10, written in Raku.

This is a solution to Advent of Code 2023 day 9, written in Raku.

This is a solution to Advent of Code 2024 day 7, written in Raku.

This is a solution to Advent of Code 2024 day 6, written in Raku.

This is a solution to Advent of Code 2024 day 5, written in Raku.

This is a solution to Advent of Code 2024 day 4, written in Raku.

This is a solution to Advent of Code 2024 day 3, written in Raku.

This is a solution to Advent of Code 2024 day 2, written in Raku.

This is a solution to Advent of Code 2024 day 1, written in Raku and in Rust.

Extending ace-window to lower a chosen frame.

A report of features and offloads implemented by ethernet drivers in Linux kernel 6.12.