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Why do I see "kernel: do_IRQ: X.Y No irq handler for vector (irq -1)" messages on systems with Intel 5500 and 5520 chipsets?

Updated 2014-03-10T18:53:11+00:00

Issue

  • What does the following error in the system logs mean:
kernel: do_IRQ: X.Y No irq handler for vector (irq -1)
  • Suddenly, networking hangs

Environment

  • Red Hat Enterprise Linux (RHEL) 6
  • Red Hat Enterprise Linux (RHEL) 5
  • Devices using Message Signaled Interrupts (MSI) or MSI-X
  • Intel 5500 and 5520 chipsets

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