What is the meaning of X2APIC disabled warnings in boot messages running RHEL 7 Update 3 on Intel Purley 4 Socket systems?

Updated -

Environment

  • Red Hat Enterprise Linux 7 Update 3
  • Intel Purley 4 Socket systems

Issue

  • When booting Red Hat Enterprise Linux 7 Update 3 on a Purley 4 Socket system the warnings similar to the following are witnessed in the boot messages
[    0.000000] ACPI: X2APIC (apic_id[0xffffffff] uid[0x00...

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