After booting the system with Xen, kdump service is failing

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Environment

SUSE Linux Enterprise Server 12 Service Pack 2 (SLES 12 SP2)

Situation

After a new installation of SLES12 SP2, kdump is failing to load the crash kernel.

systemctl status kdump shows the following errors.

 kdump.service - Load kdump kernel on startup
 Loaded: loaded (/usr/lib/systemd/system/kdump.service; enabled; vendor preset: disabled)
 Active: failed (Result: exit-code) since Wed 2016-11-09 20:14:32 JST; 4min 56s ago
 Process: 2995 ExecStart=/lib/kdump/load.sh (code=exited, status=1/FAILURE)
 Main PID: 2995 (code=exited, status=1/FAILURE)
 
 Nov 09 20:14:31 linux-rw6w systemd[1]: Starting Load kdump kernel on startup...
 Nov 09 20:14:32 linux-rw6w load.sh[2995]: Cannot load /boot/vmlinuz-4.4.21-6...t
 Nov 09 20:14:32 linux-rw6w systemd[1]: kdump.service: Main process exited, ...RE
 Nov 09 20:14:32 linux-rw6w systemd[1]: Failed to start Load kdump kernel on...p.
 Nov 09 20:14:32 linux-rw6w systemd[1]: kdump.service: Unit entered failed state.
 Nov 09 20:14:32 linux-rw6w systemd[1]: kdump.service: Failed with result 'e...'.

Resolution

Please open a service request (SR) and request a PTF for this problem.
As a temporary workaround you can edit the file /etc/default/grub and change the line:

GRUB_CMDLINE_LINUX_XEN="crashkernel=XXX"

to

GRUB_CMDLINE_XEN_DEFAULT="crashkernel=XXX"

where XXX is a placeholder for the size of the crash kernel.

After saving this file you need to run grub2-mkconfig(8)

Cause

This is a known bug and will be fixed in the next maintenance update of rubygem-cfa_grub2.

Disclaimer

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