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 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to makedumpfile in Ubuntu. https://bugs.launchpad.net/bugs/1845048 Title: /etc/default/kdump-tools KDUMP_SYSCTL does not set sysctl params Status in makedumpfile package in Ubuntu: New Bug description: [impact] Documentation, and past behavior, for kdump-tools was that the KDUMP_SYSCTL variable in the /etc/default/kdump-tools file would be applied to the system kernel params at kdump 'load'. However this is no longer true, and those params are no longer applied to the system's kernel param settings. [test case] install linux-crashdump (and kdump-tools). Edit the /etc/default/kdump-tools file to set the KDUMP_SYSCTL param to something other than default, e.g.: KDUMP_SYSCTL="kernel.panic_on_oops=1 kernel.panic_on_warn=1" reboot, or unload/reload kdump, to pick up the changes to the file. Check if the panic_on_warn param is set: $ cat /proc/sys/kernel/panic_on_warn 0 the problem does not seem to be with sysctl, as manually calling it does work: $ KDUMP_SYSCTL="kernel.panic_on_oops=1 kernel.panic_on_warn=1" $ cat /proc/sys/kernel/panic_on_warn 0 $ sudo sysctl -w $KDUMP_SYSCTL kernel.panic_on_oops = 1 kernel.panic_on_warn = 1 $ cat /proc/sys/kernel/panic_on_warn 1 [regression potential] TBD To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/makedumpfile/+bug/1845048/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
