Why did the server hang with messages like "kernel: be2net 0000:04:00.0: UE: MPU bit set" on the console?

Solution Verified - Updated -

Issue

  • Server got hung, with below be2net messages on the console.
  • What is the cause of the following be2net messages?
Jun  3 17:07:53 HOSTNAME kernel: be2net 0000:04:00.0: UE: MPU bit set
Jun  3 17:07:53 HOSTNAME kernel: be2net 0000:04:00.1: UE: MPU bit set
Jun  3 17:07:53 HOSTNAME kernel: be2net 0000:04:00.2: UE: MPU bit set
Jun  3 17:07:53 HOSTNAME kernel: be2net 0000:04:00.3: UE: MPU bit set
Jun  3 17:07:53 HOSTNAME kernel: be2net 0000:04:00.4: UE: MPU bit set
Jun  3 17:07:53 HOSTNAME kernel: be2net 0000:04:00.5: UE: MPU bit set
Jun  3 17:07:53 HOSTNAME kernel: be2net 0000:04:00.6: UE: MPU bit set
Jun  3 17:07:53 HOSTNAME kernel: be2net 0000:04:00.7: UE: MPU bit set
Jun  3 17:07:53 HOSTNAME kernel: be2net 0000:04:00.0: UE: MPU bit set
Jun  3 17:07:53 HOSTNAME kernel: be2net 0000:04:00.0: UE: RXF bit set
Jun  3 17:07:53 HOSTNAME kernel: be2net 0000:04:00.0: UE: PMEM bit set
Jun  3 17:07:53 HOSTNAME kernel: be2net 0000:04:00.0: UE: NETC bit set
  • Powercycle the server and after reboot, the messages disappeared.

Environment

  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux MRG Realtime
  • be2net module.

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