“[Firmware Bug]: ECAM area [mem 0x30000000-0x31ffffff] not reserved in ACPI namespace” appears during system boot

Solution Verified - Updated

Environment

  • Red Hat Enterprise Linux 8
  • FUJITSU MP1000 system
  • FUJITSU Supercomputer PRIMEHPC FX1000 system
  • FUJITSU Supercomputer PRIMEHPC FX700 system
  • Cray CS500 S3812 system

Issue

  • The following [Firmware Bug] appears during boot. 
acpi PNP0A08:00: [Firmware Bug]: ECAM area [mem 0x30000000-0x31ffffff] not reserved in ACPI namespace

Resolution

  • There is no known impact for the system's operation, because kernel handles the memory region for ECAM. Users can safely ignore the message.
  • The symptome is being discussed in Red Hat Bugzilla 1868526.

Root Cause

  • The firmware does not have _CRS definition for the memory region.
SBR
Product(s)
Components

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