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Jensd's I/O buffer
Personal blog · jensd.besystemsprogramming
Jensd's I/O buffer is a personal blog at jensd.be about systems and programming. Since 2015, 3 different Hacker News readers have linked it 3 times. It is still writing: the last post was on 2026-10-08, and you can follow it by feed.
Too few sampled comments (2) to say how often HN recommends it.?
Why HN links it
The comments do not judge or link this blog's writing. They discuss kernel live-patching options and reading inverter and electricity meter data over serial ports.
Summarised by Claude from a sample of 2 HN comments that link here. Each comment is marked recommending, critical or neutral (citing without judging); how this works.
What Hacker News says?
How do you do kernel updates without a reboot? I've looked several times and found different technologies over time (kexec, (Oracle's) ksplice, kGraft, kpatch, livepatch). They do appear to have some use-cases, e.g. delaying the need for a reboot by being able to install a critical vulnerability fix/workaround so that the reboot can be done at a more convenient time. Because many of the patch mechanisms are function…
Comment linking /651/linux/linux-live-kernel-patching-with-kpatch-on-centos-7
on “Ask HN: Is your company sticking to on-premise servers? Why?”Submitted Tips and tricks for Ansible as a story · 1 points
HN discussion> Metrics from an inverter, once upon a time, would have been a local web server in the device. Or just a regular serial port! For example, IEC 62056 [0] provides a fairly trivial standardized way to interact with an electricity meter using an IR reader head. Even easier, the DSMR standard outputs serial data via a 5V RJ12 connector [1]. You can connect that to a PC with a $5 USB-to-serial adapter, directly to a Ras…
Comment linking /1183/linux/read-data-from-the-belgian-digital-meter-through-the-p1-port
on “Sol-Ark manufacturer reportedly disables all Deye inverters in the US”