Oracle Linux: After OVM Guest is Upgraded From 4.1.12-94.3.9.el7uek.x86_64 to 4.1.12-124.39.5.el7uek.x86_64, Net Devices Cannot be Recognized (Doc ID 2699111.1)

Last updated on OCTOBER 16, 2022

Applies to:

Symptoms

An Oracle Linux 7 virtual machine (VM) is running on an Oracle VM 3.4.5 hypervisior. After the guest VM has been upgraded from kernel version 4.1.12-94.3.9.el7uek.x86_64 to 4.1.12-124.39.5.el7uek.x86_64, it may become stuck on boot with the virtual network interfaces not being recognized.

This usually happens when a very large number of virtual block and network devices exist on the guest VM.

When this occurs the following errors will be seen in the guest VM's syslog:

However, this behavior is not observed if the guest VM is booted with the RHCK kernel, such as RHCK kernel version 3.10.0-693.el7.x86_64.

Cause

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