Debugging kernel crashes using kdump
Memory must be reserved for the crash kernel during booting of the first kernel.
crashkernel=autois likely insufficient memory on Fedora CoreOS. It is recommended to start testing with 300M. Kernel arguments can be provided like this:
sudo rpm-ostree kargs --append='crashkernel=300M'
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
It is highly recommended to test the configuration after setting up the