I've reported a Debian bug with the proposed fixes; the merge report has the information about the approach used to deal with sysctl in kdump: https://salsa.debian.org/debian/makedumpfile/-/merge_requests/2
Cheers, Guilherme ** Bug watch added: Debian Bug tracker #961880 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=961880 ** Also affects: makedumpfile (Debian) via https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=961880 Importance: Unknown Status: Unknown ** Summary changed: - /etc/default/kdump-tools KDUMP_SYSCTL does not set sysctl params + Improve sysctl handling on kdump-tools -- 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: Improve sysctl handling on kdump-tools Status in makedumpfile package in Ubuntu: Confirmed Status in makedumpfile source package in Xenial: Confirmed Status in makedumpfile source package in Bionic: Confirmed Status in makedumpfile source package in Eoan: Confirmed Status in makedumpfile source package in Focal: Confirmed Status in makedumpfile package in Debian: Unknown 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 : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
