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["Guilherme G. Piccoli" <1845048@xxxxxxxxxxxxxxxxxx>]

** Changed in: makedumpfile (Ubuntu)
       Status: Confirmed => In Progress

** Changed in: makedumpfile (Ubuntu Xenial)
       Status: Confirmed => Opinion

** Changed in: makedumpfile (Ubuntu Bionic)
       Status: Confirmed => In Progress

** Changed in: makedumpfile (Ubuntu Eoan)
       Status: Confirmed => In Progress

** Changed in: makedumpfile (Ubuntu Focal)
       Status: Confirmed => In Progress

** Also affects: makedumpfile (Ubuntu Groovy)
   Importance: Medium
     Assignee: Guilherme G. Piccoli (gpiccoli)
       Status: In Progress

** Tags added: sts

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https://bugs.launchpad.net/bugs/1845048

Title:
  Improve sysctl handling on kdump-tools

Status in makedumpfile package in Ubuntu:
  In Progress
Status in makedumpfile source package in Xenial:
  Opinion
Status in makedumpfile source package in Bionic:
  In Progress
Status in makedumpfile source package in Eoan:
  In Progress
Status in makedumpfile source package in Focal:
  In Progress
Status in makedumpfile source package in Groovy:
  In Progress
Status in makedumpfile package in Debian:
  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

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