RHEL 8 マイナーバージョン別、大きめsystemdバグ修正 - 赤帽エンジニアブログ
Red Hatの森若です。 「RHELは常にアップデートして、最新バージョンを使ってください。既知の問題が直っているからいいですよ」という話はよくします。 ふと「具体的にどんな問題があったのか/直したのかがわかるといいのかもしれない」と思いつきました。 最近は暑いので怖い話も多少は需要があるでしょう。 そこでナレッジベースからsystemdの大きめの問題修正をピックアップしてみました。 以下では、私が独断と偏見でピックアップした systemdの大きめの問題 について、修正されたマイナーリリース毎に紹介していきます。 RHEL 8.1 systemd-journald プロセスのヒープメモリ使用量が徐々に増加する問題：systemd-journald プロセスのヒープメモリ使用量が徐々に高くなることがありましたが、これは systemd-239-18.el8_1.1 で修正されました。 s
systemd has been a complete, utter, unmitigated success
Figure 1: The systemd wars of the tenties were harsh and casualties were many The year is 2013 and I am hopping mad. systemd is replacing my plaintext logs with a binary format and pumping steroids into init and it is laughing at me. The unix philosophy cries out: is this the end of Linux (or, as many are calling it, GNU plus Linux)? The year is 2025 and I’m here to repent. Not only is systemd a w
Writing a basic Linux device driver when you know nothing about Linux drivers or USB
A couple of months ago I bought the Nanoleaf Pegboard Desk Dock, the latest and greatest in USB-hub-with-RGB-LEDs-and-hooks-for-gadgets technology. This invention unfortunately only supports the real gamer operating systems of Windows and macOS, which necessitated the development of a Linux driver. Over the past few posts I’ve set up a Windows VM with USB passthrough, and attempted to reverse-engi
strace tips for better debugging
Recently, I have been building software without libc to better understand Linux syscalls and internals better. So far, I have built a minimal shell, terminal Snake game, pure ARM64 assembly HTTP server and threads implementation. I have been using strace extensively while debugging. Useful options and flags# I use a version of the following command: This looks like an alphabet soup of options! Her
Too Many Open Files
Fortunately, the error is pretty explicit and straightfoward so I was able to understand what was going on in a reasonable time. I’ve started digging a bit and learned some stuff along the way. Ever wondered how your programs juggle multiple tasks - reading files, sending data over the network, or even just displaying text on your screen - all at once? File descriptors are what make this all possi
Open Source Can't Coordinate
Open Source Can’t Coordinate May 20, 2025 I was taking a shower this morning, and was pondering yesterday’s problem, where I suspect that I have an outdated version of hotspot Linux profiler, but I can’t just go and download a fresh release from GitHub, because hotspot is a KDE app, and I use NixOS. And NixOS isn’t a problem — it’s a solution. Linux on desktop is a rickety tower of competing libra
GitHub - tio/tio: A serial device I/O tool
Easily connect to serial TTY devices Sensible defaults (115200 8n1) Automatic connection management Automatic detection of serial ports Automatic reconnect Automatically connect to first new appearing serial device Automatically connect to latest registered serial device Connect to same port/device combination via unique topology ID (TID) Useful for reconnecting when serial device has no serial de
nproc、意図通り使えていますか？ - yanorei32の雑記
しかし、それが「適さない環境」があること、ご存知でしたか？ nproc の返す数字ってなんだ？ ¶ 「コア数に決まっているだろう」「スレッド数だ、バカタレ」 までは、よく議論するかと思います。 実際の挙動 ¶ もし、先の説明通りならば、システムの起動中に「ダイナミック」に値が増減するはずはないのですが…。 ~$ while : ; do echo $(date) / nproc: $(nproc); done | uniq Fri May 9 14:44:27 JST 2025 / nproc: 6 Fri May 9 14:44:28 JST 2025 / nproc: 6 Fri May 9 14:44:28 JST 2025 / nproc: 7 Fri May 9 14:44:28 JST 2025 / nproc: 8 Fri May 9 14:44:28 JST 2025 /
GitHub - al13n321/nnd: A debugger for Linux
A debugger for Linux. Partially inspired by RemedyBG. Mom, can we have RAD Debugger on Linux? No, we have debugger at home. Debugger at home: Properties: Fast. TUI. Not based on gdb or lldb, implemented mostly from scratch. Works on large executables. (Tested mostly on 2.5 GB ClickHouse.) What we mean by "fast": Operations that can be instantaneous should be instantaneous. I.e. snappy UI, no rando
Introducing Styrolite: Building a Linux Container Runtime from Scratch
Edera Protect 1.0 is now generally available. See it live at KubeCon Edera Protect is a suite of offerings bridging the gap between modern cloud native computing and virtualization-based security techniques. To power this platform, we've built our own container runtime designed to operate as a microservice, allowing it to run containers in a fully programmatic way—similar to how the Kubernetes Con
Quadlet: Running Podman containers under systemd
2024-01-02, updated: 2024-02-19 Tags: #container,#linux,#selfhosting Reading time: ~11min Quadlet lets you run your Podman containers as systemd services. This is especially useful for running containers in the background and automatically starting them after a server reboot. Running Podman containers under systemd isn't new. Indeed, this was supported by Podman for a long time with the command po
Ruby: fork(2)がみんなに嫌われる理由（翻訳）｜TechRacho by BPS株式会社
概要 原著者の許諾を得て翻訳・公開いたします。 英語記事: Why Does Everyone Hate fork(2)? | byroot’s blog 原文公開日: 2025/01/25 原著者: byroot -- Railsコアコミッター、Rubyコミッターであり、ShopifyのRuby/Railsインフラチームのシニアスタッフエンジニアです 私がやりたいのは、Pitchforkに関する記事を書いて、これがどんな理由でできたのか、なぜ現在のような形になったのか、そして今後どうなるのかについて説明することです。しかしその前に、いくつか解説しておく必要があります。 なぜ多くの人がforkを過去の遺物呼ばわりし、下手をすると悪魔の作りしものであるかのような目で見るのでしょうか？forkはRubyエコシステムのどこにでもあるにもかかわらず、です。 システムプログラミングの経験者なら、おそ
Carefully But Purposefully Oxidising Ubuntu
Last month I published Engineering Ubuntu For The Next 20 Years, which outlines four key themes for how I intend to evolve Ubuntu in the coming years. In this post, I’ll focus on “Modernisation”. There are many areas we could look to modernise in Ubuntu: we could focus on the graphical shell experience, the virtualisation stack, core system utilities, default shell utilities, etc. Over the years,
リリース、障害情報などのサービスのお知らせ
最新の人気エントリーの配信
j次のブックマーク
k前のブックマーク
lあとで読む
eコメント一覧を開く
oページを開く
A Higgs-bugson in the Linux Kernel
Linux cgroup from first principles
Preventing outages with pkill's new --require-handler flag
Man pages are great, man readers are the problem
Grepping logs remains terrible - Chronicae Novis Rebus
Problems with the heap | Hacker News
GitHub - Zouuup/landrun: Run any Linux process in a secure, unprivileged sandbox using Landlock. Think firejail, but lightweight, user-friendly, and baked into the kernel.
