https://bugzilla.kernel.org/show_bug.cgi?id=73931
--- Comment #5 from Pali Rohár pali.rohar@gmail.com --- Created attachment 132251 --> https://bugzilla.kernel.org/attachment.cgi?id=132251&action=edit pstore log
Now I found pstore and its efi backend...
I modprobed efi-pstore before rmmoding radeon and dmesg logs were stored into efi after kernel crash. So I belive that something usefull is there for you.
Attachment generated by: $ cd /sys/fs/pstore/; cat `ls -r *1; ls -r *2`