Debugging kernel crashes using kdump
Memory must be reserved for the crash kernel during booting of the first kernel. Kernel arguments can be provided like this:
sudo rpm-ostree kargs --append='crashkernel=256M'
More information on how to modify kargs via
By default, the path in which the vmcore will be saved is
/var/crash. It is also possible to write the dump over the network or to some other location on the local system by editing
/etc/kdump.conf. For additional information, see
kdump.conf(5)and the comments in
Enable the kdump systemd service.
sudo systemctl enable kdump.service
Reboot your system.
sudo systemctl reboot