Building a Robust Embedded Linux Platform

on YouTube ↗55m

" summary

The talk covers challenges and solutions for building robust embedded Linux platforms, including handling power-failure-safe upgrades and reducing memory footprint, and enabling third-party development via SDKs and rich libraries/apps. It explains strategies and mechanisms implemented using OpenEmbedded, illustrated with the real-world HidaV platform project.

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" chapters (20)

1. 0:00Start
2. 14:50Compatibility issues (config!) Fringe Situations Real Software Bugs
3. 16:34SDK, Build System, Debug Tools? Software Lifecycle Management? Extensive Application Catalog? Easily Extensible?
4. 17:48State of the Art Software Package Manager Fast, parallel, event-driven INIT
5. 18:22Un-Brickable Safe Package Mgmt / Image Upgrades System Configuration Fallbacks
6. 19:29System/Hardware Requirements Hardening OpenEmbedded
7. 21:01RAM Interfaces Minimum CPU req.
8. 25:04Single Point of Optimization Robust code + workflows Common System FS layout
9. 26:01Can increase degrees of freedom by minimizing Risk by providing reliable system features enabling for base platform concepts
10. 27:05Kernel & Root FS System Upgrade Package Management
11. 33:16Transmission Sanity Atomic Switch "System upgrade" system state?
12. 33:55Checksum everything Cache downloads (don't DL+Write) Verify, then Write Switch atomically
13. 40:15Remember System Upgrade? Checksum, Cache downloads Verify, then Write Switch atomically
14. 40:39Remember Transparent Overlays? Storage back-end is a directory How does it store its data?
15. 42:29Redundant Kernel and Root FS Atomic Switches + Fallbacks
16. 43:36SDK: compiler, build tools, sandboxing Thousands of apps, libs Built-in Package Management Big lively community, sub-projects
17. 44:24Pluggable "Layer" concept Core, BSPs, Distributions, Tools Easy to extend
18. 45:24Throughout: image is a set of pkgs Versioning, deps, conflicts = upgrade paths
19. 46:53System-wide optimizations Independence from distro politics Full systemd / upstart integration
20. 48:25Be pluggable Be re-usable Provide a foundation to build on

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