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How to Write a Kernel Bug Report Maintainers Act On
A kernel bug report that maintainers act on has a specific shape. How to pick the right kernel, check taint, find the maintainer, and write it.
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Field notes from the Linux trenches
Deep dives, debugging war-stories and career guidance for engineers who work where the kernel meets real hardware.
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InsightsInsights
Your 32-bit Product Will Fail in 2038. Your Build Will Not Stop It.
A 32-bit time_t stops working in 2038. OE-core fixes it by default only since Yocto 4.3, and the QA check that would…
RB Aug 13 · 13 min
Deep DivesDeep Dives
Embedded Linux Boot Time — Part 2: Measuring the Kernel and User Space
A long initcall is often a waiting initcall, and the log gives you no way to tell. How to read initcall_debug without…
RB Aug 13 · 20 min
CareerCareer
Why Engineers Need a Failure Portfolio, Not Just a Project Portfolio
A project portfolio shows what was built. A failure portfolio shows how an engineer thinks when the system does not match the…
RB Aug 12 · 14 min
System DesignSystem Design
Choosing a Root Filesystem Format for Embedded Linux
How to choose a root filesystem format for embedded Linux: ext4, f2fs, squashfs with overlayfs, or UBIFS on raw NAND — and…
RB Aug 12 · 8 min
NewsNews
Kernel & Embedded News: Linux 7.2 Final RC; FFmpeg 9.0 Released
Linux 7.2 rc7 closes the cycle; AI review lifts fix volume. FFmpeg 9.0 lands with an ABI break, a PCI lockdown gap…
RB Aug 11 · 12 min
TutorialsTutorials
Capturing a Kernel Crash Dump with kdump on ARM64
Set up kdump on an ARM64 board: reserve crashkernel memory, load a capture kernel with kexec -p, then trigger a panic and…
RB Aug 11 · 14 min
InsightsInsights
SoC Kernel Support: How to Tell If Yours Has Already Lapsed
SoC kernel support runs on three clocks: upstream LTS EOL, vendor branch head, silicon longevity. Check all three before choosing an SoC…
RB Aug 10 · 21 min
NewsNews
What fork() Actually Costs, and Why the Process-Builder RFC Does Not Fix It Yet
A process-builder API is proposed for Linux to replace fork()+exec(). We check the performance claim against kernel source and ask if it…
RB Aug 10 · 19 min
TutorialsTutorials
Kernel Dynamic Debug: Turning On pr_debug at Runtime
Kernel dynamic debug turns pr_debug and dev_dbg messages on at runtime, per file, function or module, with no kernel rebuild. A hands-on…
RB Aug 9 · 11 min
CareerCareer
Don’t Pay for Information. Pay for Mentorship.
In the AI era, the value of training is not more content. It is feedback that builds judgment under uncertainty.
RB Aug 9 · 6 min
Kernel SecurityKernel Security
Linux Kernel CVEs: What to Patch by Device (2 – 8 Aug 2026)
46 Linux kernel CVEs (2–8 Aug 2026) with the minimum safe version per branch — including CVE-2026-64562, CVE-2026-68480 and what to patch…
RB Aug 8 · 10 min
System DesignSystem Design
Choosing an A/B Update Layout for Your Product
Symmetric, asymmetric, split, or rescue-augmented: pick the A/B update layout that matches your storage, boot time, and release cadence.
RB Aug 8 · 9 min
Deep DivesDeep Dives
Embedded Linux Boot Time — Part 1: The Phase You Are Not Measuring
Part 1 of two. Boot time spans four phases with four independent clocks, and dmesg only shows the third. How to put…
RB Aug 7 · 19 min
NewsNews
Kernel & Embedded News: AI-Written Patch Rules; AMD Ryzen X100
The Linux kernel publishes guidelines for tool-generated content and AI patches; sched_ext gains sub-schedulers; AMD's Ryzen AI Embedded X100 targets robots.
RB Aug 6 · 12 min
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