Using makedumpfile to drop unneccessary pages during vmcore write is slower when -d30 or -d31 is specified and huge pages are reserved

Solution Verified - Updated -

Issue

  • It seems -d 30 && -d 31 with makedumpfile is much slower with hugepages reserved. Is this expected behaviour?

Environment

  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 5
  • kexec-tools

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