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An IRQ Storm on an Embedded Gateway
On an embedded gateway, Wi-Fi kept dying and never came back until a reboot. The kernel log named an IRQ storm, and…
RB Jul 28 · 9 min
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Debug Stories
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Debug Story: A Hung Task That Froze an Embedded Board
A debug story from an embedded Linux board: a hung task froze the system. How khungtaskd reports it, reading the blocked-task stack,…
RB Jun 29 · 10 min
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Debug Story: Sleeping Function Called From Invalid Context in a Kernel Driver
A kernel debug story: how we root-caused a "sleeping function called from invalid context" BUG caused by kmalloc(GFP_KERNEL) under a spinlock, and…
RB Jun 24 · 8 min
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Don’t jump to the solution
One of the most valuable skills an engineer can develop is also one of the least discussed: the ability to properly define…
RB Jun 13 · 4 min
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