Just a heads-up on top of my own email: as soon as I sent the email, I had an idea. I was trying with ramoops.ftrace_size=X, so I removed this parameter and it worked. As expected, it's a small buffer so collected mostly the ramoops own functions, but worked in the end - I'll debug the reason it failed with ftrace_size.
Apologies for the inconvenience! Cheers, Guilherme

