Out of memory (OOM) or hang during vmcore collection (ie. kdump) due to sysctl.conf settings.

Solution Verified - Updated -

Issue

  • vmcore file collection is receiving Out of memory (OOM) while loading the kdump environment due to sysctl settings like vm.nr_hugepages being included.
  • vmcore file collection is hanging while loading the kdump environment due to sysctl settings like vm.nr_hugepages being included.
  • Why sysctl.conf file is included in initramfs in RHEL 7 ?

Environment

  • Red Hat Enterprise Linux (RHEL) 7.0
    • kexec-tools-2.0.4-32.el7_0.5 or earlier

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