[s390x] crashkernel reservation failed: first memory chunk must be at least crashkernel size

Solution Verified - Updated -

Issue

  • The kdump service fails since the memory is not reserved for crashkernel by showing below message.
kernel: setup: crashkernel reservation failed: first memory chunk must be at least crashkernel size
kernel: Kernel command line: root=/dev/mapper/vg_sys-lv_root crashkernel=1G-4G:192M,4G-64G:256M,64G-:512M
..
kdumpctl[2243]: kdump: No memory reserved for crash kernel
kdumpctl[2243]: kdump: Starting kdump: [FAILED]

Environment

  • Red Hat Enterprise Linux 9
  • s390x z/VM Guest.

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