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Oracle Linux: KVM VM Intermittent Loss of Communications: "IRQ192: set affinity failed(-28)" (Doc ID 3027467.1)

Last updated on JUNE 06, 2024

Applies to:

Oracle Cloud Infrastructure - Version N/A and later
Linux x86-64

Symptoms

  1. During the CPU offline (scaling down), the interrupts cannot be migrated to other CPUs.  The issue can be seen to cause networking issues seen at the Guest VM level and also on the Hypervisor
    From the Hypervisor, an increase in "rx_drops" is seen for the vnet interfaces assigned to the Guest VM:

Changes

CPU scaling down.

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References


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