There's an article called something like "The logging system you can't have" which talks about using a similar thing. In the case of a panic, the device would r

There's an article called something like "The logging system you can't have" which talks about using a similar thing. In the case of a panic, the device would restart and find the buffer in memory, allowing you to recover crash data across boots. From memory they then pointed all logs as /dev/kmsg rather than /var/log/syslog or equivalent logger, so that all userspace logs were buffered immediately into memory. I think that the system logger then read from the buffer? Wish I could find the article.