Setting 'crashkernel=auto' results in zero bytes of reserved memory for kdump kernel.

Solution Unverified - Updated -

Issue

  • Kdump service fails to start with below message.
  • Memory reservation for kdump kernel is failing.
less var/log/dmesg | grep -i kexec
[    0.000000] kexec: crashkernel=auto resulted in zero bytes of reserved memory.

Environment

  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • x86_64, ppc64, s390x architectures

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