~/talk

Improving fw_devlink dependency tracking

on YouTube 22m
Talkat Linux Plumbers Conference 2025 · 2025-12-11..12-13· [linux-and-operating-systems]

speaker

name:Saravana Kannan
links:none on file

resources

video:https://youtu.be/xSXbDlKwjlE
slides:none on file

summary

Current fw_devlink parses every device tree property with a dedicated parser in drivers/of/property (around 40 today) and that won't scale to hundreds, so the proposal tests three fixes: have DTC emit a _references property listing all phandles, use the DT overlay local fixups node created by the plugin directive to record phandle offsets, or extend libfdt/DTB to encode per-property type info. Tradeoffs are parsing overhead, DTB size, runtime patching consistency, and whether async probing can safely become default.

AI-written summary · about

chapters (5)

  1. 0:00Introduction to fw_devlink
  2. 2:28Current dependency tracking issues
  3. 3:55Potential solutions for fw_devlink
  4. 10:01Devlink as functional requirement
  5. 19:40Q&A and wrap-up

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