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Description of problem:
QE found some error/panic on 2nd kernel, like bug:
https://bugzilla.redhat.com/show_bug.cgi?id=1352430
https://bugzilla.redhat.com/show_bug.cgi?id=1266622

I have talked with Dave Young, he said, "crashkernel=auto does not
support debug kernel because a lot of debug options been enabled."
I think we should announce this in our kexec-kdump-howto.txt file,
if anyone want to use kdump on debug kernel.

Version-Release number of selected component (if applicable):


How reproducible:


Steps to Reproduce:
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Actual results:


Expected results:


Additional info:

Now is 7.4, add 7.4.0 flag.

As discussed with Dave and Bao on IRC, the debug kernels cannot be reliably used as crash/kdump kernels when the crash kernel memory is setup using the 'crashkernel=auto' boot argument.

This is because the debug kernels might enable a number of features which might cause the memory used by the same to swell up, which cannot be reliably met by using 'crashkernel=auto' boot argument.

Will cook up a patch to mention this limitation in kexec-kdump-howto.txt file.

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-2017:2300