Known Issues for UEK 8

When booted in FIPS mode, a system using Btrfs fails with the following message:

FATAL: FIPS integrity test failed
Refusing to continue

Booting into UEK 8 using a Btrfs file system with FIPS mode enabled isn't supported.

(Bug ID 36028061)

The following features are known to not work, remain untested, or have issues that render the feature unusable. The following features aren't supported on Arm platforms:

• InfiniBand

• FibreChannel

• RDMA

On some Xen-based virtualization platforms, such as Oracle VM 3.4, only the first CPU is initialized when the guest VM is started. VM boot is slow, the remaining configured CPUs fail to report an alive state, and the following errors might appear in the VM dmesg output:

...
[   10.190039] CPU1 failed to report alive state
[   20.192038] CPU2 failed to report alive state
...

The issue is related to a problem in the Xen hypervisor's x2apic emulation. The incorrect APIC ID is returned.

To work around the issue, add the nox2apic parameter to the kernel command line and reboot.

1. In the VM, edit /etc/default/grub to add the nox2apic parameter to the GRUB_CMDLINE_LINUX entry:

   GRUB_CMDLINE_LINUX="...... nox2apic"

2. Regenerate the /boot/grub2/grub.cfg file:

   sudo grub2-mkconfig -o /boot/grub2/grub.cfg --update-bls-cmdline

3. Reboot the virtual machine

(Bug 38006792)

You can upgrade the Oracle RDMA packages on Oracle Linux by using the dnf update command.

If you're upgrading a system that has the oracle-rdma-release or oracle-rdma-release-guest package installed, if the package version is lower than version 0.18.1-1 and you intend to upgrade to version 0.18.1-1, or later, you must first manually remove the rdma-core-devel package. Remove this package by using the rpm -e --nodeps command, which removes the package outside of the standard yum or DNF package manager control and leaves any dependencies intact, for example:

sudo /bin/rpm -e --nodeps rdma-core-devel
sudo dnf update

sudo dnf remove oracle-rdma-release*