What happens to docker containers when FIFO log is full and daemon is down


I am planning to use the live-restore feature of docker.
The document has a section “Impact of live restore on running containers” which mentions FIFO log buffer.
I couldn’t find much information about this FIFO log buffer (maybe it is called by some other name elsewhere).
What is the purpose of this log buffer and what impact would it have on my containers if the buffer gets full?
Is it just that the container logs would be lost, or does it have any other impact on the container?

Source: StackOverflow