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Description of problem:

Like summary, kdumpctl should check makedumpfile timestamp.
Here is some test log:
[root@hp-z230 ~]# kdumpctl restart
kexec: unloaded kdump kernel
Stopping kdump: [OK]
kexec: loaded kdump kernel
Starting kdump: [OK]

[root@hp-z230 ~]# ls -l /sbin/makedumpfile 
-rwxr-xr-x. 1 root root 360480 Jun 27 21:28 /sbin/makedumpfile
[root@hp-z230 ~]# touch /sbin/makedumpfile 
[root@hp-z230 ~]# ls -l /sbin/makedumpfile 
-rwxr-xr-x. 1 root root 360480 Oct 31 10:49 /sbin/makedumpfile
[root@hp-z230 ~]# kdumpctl restart
kexec: unloaded kdump kernel
Stopping kdump: [OK]
kexec: loaded kdump kernel
Starting kdump: [OK]


Kdumpctl should rebuild initramfs file when use new makedumpfile file.

Version-Release number of selected component (if applicable):
7.4 GA kernel/kexec-tools/makedumpfile package.

How reproducible:


Steps to Reproduce:
1.
2.
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Actual results:


Expected results:


Additional info:

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2018:3240