Ramoops: Persistent Logging for Embedded Systems

Embedded systems aren't immune to crashes. To analyze and log these crashes, a persistent storage solution is crucial. Ramoops provides this by leveraging a reserved RAM area to store kernel oops messages, kernel console output, and user messages. While RAM data is lost on power loss, it offers faster write speeds and is almost always available while the CPU is running. This article details configuring and using Ramoops on a Toradex Apalis iMX8QM system, covering device tree modification, kernel compilation, and reading log files from pstore. It demonstrates logging kernel panics and user messages, aiding in diagnosing system crashes.