541
Fuzix on a Raspberry Pi Pico
Because your $5 microcontroller needed to run UNIX
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The latest blog posts to take off on Hacker News. 6,943 posts.
542
Pizlix: Memory Safe Linux from Scratch
Pizlix is LFS (Linux From Scratch) 12.2 with some added components, where userland is compiled with Fil-C. This means you get the most memory safe Linux-like OS currently available.
543
Closures as Win32 Window Procedures
Back in 2017 I wrote about a technique for creating closures in C using JIT-compiled wrapper. It’s neat, though rarely necessary in real programs, so I don’t think about it often. I applied it to qsort , which sadly accepts no context pointer. More practical would be working around insufficient custom allocator…
544
Linux Sandboxes and Fil-C
Memory safety and sandboxing are two different things. It's reasonable to think of them as orthogonal: you could have memory safety but not be sandboxed, or you could be sandboxed but not memory safe.
545
We built another object storage
High-performance object storage exists, but the economics make it unusable at scale. FractalBits breaks out of the high-performance trap.
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547
Linux CVEs, more than you ever wanted to know
It’s been almost 2 full years since Linux became a CNA (Certificate Numbering Authority) which meant that we (i.e. the kernel.org community) are now responsible for issuing all CVEs for the Linux kernel. During this time, we’ve become one of the largest creators of CVEs by quantity, going from nothing to number 3 in…
548
The stack circuitry of the Intel 8087 floating point chip, reverse-engineered
Early microprocessors were very slow when operating with floating-point numbers. But in 1980, Intel introduced the 8087 floating-point copro...
549
Jepsen: NATS 2.12.1
NATS is a popular streaming system. Producers publish messages to streams , and consumers subscribe to those streams, fetching messages from them. Regular NATS streams are allowed to drop messages. However, NATS has a subsystem called JetStream , which uses the Raft consensus algorithm to replicate data among nodes…
550
From Azure Functions to FreeBSD
Putting FreeBSD’s “power to serve” motto to the test. On Thanksgiving morning, I woke up to one of my web services being unavailable. All HTTP requests failed with a “503 Service unavailable” error. I logged into the console, saw a simplistic “Runtime version: Error” message, and was not able to diagnose the problem…
551
The Anatomy of a macOS App
How Mac applications evolved from a multitude of resources to a bundle formed from a standard layout of directories, and how they have come to be largely self-contained in macOS 26.
552
Go is portable, until it isn't
An exploration of Go's portability limits when integrating with system-specific C libraries like libsystemd and dealing with glibc vs. musl systems.
553
Cloudflare outage on December 5, 2025
Cloudflare experienced a significant traffic outage on December 5, 2025, starting approximately at 8:47 UTC. The incident lasted approximately 25 minutes before resolution. We are sorry for the impact that it caused to our customers and the Internet. The incident was not caused by an attack and was due to…
554
Netflix’s AV1 Journey: From Android to TVs and Beyond
Liwei Guo, Zhi Li, Sheldon Radford, Jeff Watts
555
Proxmox Datacenter Manager 1.0 available
Latest announcements for Proxmox.
556
Booting Linux in QEMU and Writing PID 1 in Go to Illustrate Kernel as Program
Most books and courses introduce Linux through shell commands, leaving the kernel as a mysterious black box doing magic behind the scenes. In this post, we will run some experiments to demystify it: the Linux kernel is just a binary that you can build and run.
557
Golang's big miss on memory arenas
When your software team needs to pick a language today, you typically weigh two factors: language performance and developer velocity.
558
You can't fool the optimizer
Pattern recognition can see through obfuscated code to find the right instruction
559
100k TPS over a billion rows: the unreasonable effectiveness of SQLite
A blog mostly about Clojure programming
560
Addressing the adding situation
We learn why adding on x86 isn't as obvious as you might think
561
Advent of Compiler Optimisations 2025
Announcing AoCO 2025 - daily December posts about compiler optimisations
562
Comparing AWS Lambda ARM64 vs. x86_64 Performance Across Runtimes in Late 2025
See how AWS Lambda arm64 stacks up against x86_64 in real-world benchmarks across CPU, memory, and I/O workloads using Node.js, Python, and Rust.
563
Rootless Pings in Rust
Sending a ping by creating an ICMP socket normally requires root: you can’t create a raw socket to send ICMP packets without it. The ping command line tool works without root however, how is that possible? It turns out you can create a UDP socket with a protocol flag, which allows you to send the ping rootless. I…
564
Last Week on My Mac: Losing confidence
What was the key to successfully learning to drive, ride a bike, or speak a foreign language? Confidence, and it’s every bit as important in computing, and in macOS.
565
Why xor eax, eax?
Why do compilers love xor-ing registers so much?
566
Idempotency keys for exactly-once processing
In distributed systems, there’s a common understanding that it is not possible to guarantee exactly-once delivery of messages. What is possible though is exactly-once processing. By adding a unique …
567
A Love Letter to FreeBSD
I’m still the new person here, learning your ways, stumbling over the occasional quirk, smiling when I find the small touches that make you different. You remind me of what computing felt like before the noise. Before hype cycles and performance theatre. Before every tool needed a plugin system and a logo. You are…
568
Windows drive letters are not limited to A-Z
If you want €:\, you can have it, sort of
569
Landlock-Ing Linux
Landlock is a Linux API that lets applications explicitly declare which resources they are allowed to access. Its philosophy is similar to OpenBSD’s unveil() and (less so) pledge() : programs can make a contract with the kernel stating, “I only need these files or resources — deny me everything else if I’m…
570
Airbus A320 Fly by wire corrupted by radiation in flight
Aviation insiders say an airworthiness directive may soon require software updates across the Airbus A320 fleet after investigators linked a JetBlue incident—where the aircraft entered a sudden uncommanded descent—to a faulty ELAC computer. Any grounding is expected to be short and staggered, with airlines updating…