Public bug reported:
[Impact]
Crash dump support doesn't work by default on any known arm64 platform. Users
have to figure out working incantations for the crashkernel= parameter and the
parameters passed to the crash-dump kernel themselves and manual edit 2
different config files.
[Test Case]
Using either a Centriq 2400 or a Cavium ThunderX CRB (these platforms are known
to support crashdump), and with a kernel >= 4.13 (xenial-ga did not support
crashdump):
sudo apt install kdump-tools
(reboot, so crashkernel= is added to the kernel commandline)
echo c | sudo tee /proc/sysrq-trigger
Crash dump should occur, with artifacts collected in /var/crash.
If you want to verify that the dump is usable, install the corresponding
linux-image-<ver>-dbgsym package and run:
sudo crash /usr/lib/debug/boot/vmlinux-<ver>
/var/crash/<crash>/dump.<crash>
crash should successfully load, placing you at a "crash>" prompt. At that
prompt, you can issue the 'bt' command to see a backtrace.
Note: you need crash from zesty (7.1.8-1ubuntu1) or later.
[Regression Risk]
TBD
** Affects: kexec-tools (Ubuntu)
Importance: Undecided
Status: New
** Affects: makedumpfile (Ubuntu)
Importance: Undecided
Status: New
** Affects: kexec-tools (Ubuntu Xenial)
Importance: Undecided
Status: New
** Affects: makedumpfile (Ubuntu Xenial)
Importance: Undecided
Status: New
** Affects: kexec-tools (Ubuntu Artful)
Importance: Undecided
Status: New
** Affects: makedumpfile (Ubuntu Artful)
Importance: Undecided
Status: New
** Affects: makedumpfile (Debian)
Importance: Unknown
Status: Unknown
** Also affects: kexec-tools (Ubuntu)
Importance: Undecided
Status: New
** Bug watch added: Debian Bug tracker #883899
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=883899
** Also affects: makedumpfile (Debian) via
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=883899
Importance: Unknown
Status: Unknown
** Also affects: kexec-tools (Ubuntu Artful)
Importance: Undecided
Status: New
** Also affects: makedumpfile (Ubuntu Artful)
Importance: Undecided
Status: New
** Also affects: kexec-tools (Ubuntu Xenial)
Importance: Undecided
Status: New
** Also affects: makedumpfile (Ubuntu Xenial)
Importance: Undecided
Status: New
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You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1763532
Title:
set reasonable default cmdlines for arm64
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