Comment 1 for bug 1845048

Also to clarify, manually unloading/reloading kdump doesn't set the params properly:

ubuntu@makedumpfile-e:~$ grep . /proc/sys/kernel/panic_on_warn
0
ubuntu@makedumpfile-e:~$ sudo kdump-config show
DUMP_MODE: kdump
USE_KDUMP: 1
KDUMP_SYSCTL: kernel.panic_on_oops=1 kernel.panic_on_warn=1
KDUMP_COREDIR: /var/crash
crashkernel addr: 0xaa000000
   /var/lib/kdump/vmlinuz: symbolic link to /boot/vmlinuz-5.3.0-10-generic
kdump initrd:
   /var/lib/kdump/initrd.img: symbolic link to /var/lib/kdump/initrd.img-5.3.0-10-generic
current state: ready to kdump

kexec command:
  /sbin/kexec -p --command-line="BOOT_IMAGE=/boot/vmlinuz-5.3.0-10-generic root=PARTUUID=7975ae09-1bd6-4c5f-b460-5f5218cc2327 ro console=tty1 console=ttyS0 systemd.unit=kdump-tools-dump.service nr_cpus=1 irqpoll nousb ata_piix.prefer_ms_hyperv=0" --initrd=/var/lib/kdump/initrd.img /var/lib/kdump/vmlinuz
ubuntu@makedumpfile-e:~$ sudo kdump-config unload
 * unloaded kdump kernel
ubuntu@makedumpfile-e:~$ sudo kdump-config load
 * Creating symlink /var/lib/kdump/vmlinuz
 * Creating symlink /var/lib/kdump/initrd.img
 * loaded kdump kernel
ubuntu@makedumpfile-e:~$ grep . /proc/sys/kernel/panic_on_warn
0