group.of.nepali.translators team mailing list archive

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

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

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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

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