The software described in this documentation is either in Extended Support or Sustaining Support. See https://www.oracle.com/us/support/library/enterprise-linux-support-policies-069172.pdf for more information.
Oracle recommends that you upgrade the software described by this documentation as soon as possible.

2.2 Known Issues

2.2.1 Updating Oracle Linux Fails if the kernel-uek Package Cannot Be Updated
2.2.2 avahi-daemon Fails to Start with UEK R2
2.2.3 Booting UEK R2 as a PVHVM Guest
2.2.4 Btrfs File System Issues
2.2.5 Console Appears to Hang when Booting
2.2.6 Default I/O Scheduler
2.2.7 Default NFS Mount Options
2.2.8 Default Reverse Path Filtering Mode Affects Certain Oracle Products
2.2.9 dm-cache and dm-era
2.2.10 DTrace Issues
2.2.11 Enabling FIPS Mode
2.2.12 Error message Following First Reboot on an HP ProLiant Server
2.2.13 ext4 Inline Data
2.2.14 gcc-libraries Package
2.2.15 ib_core Fails to Unload when the RDMA Service Is Stopped
2.2.16 Incorrect Package Count
2.2.17 Intel TCO Watchdog Timer Messages
2.2.18 Journal Corruption in Virtualized Systems
2.2.19 Kdump Service Configuration
2.2.20 Kdump Service Cannot Be Enabled by Using system-config-kdump Under UEK R3
2.2.21 kernel-uek-headers Package
2.2.22 Linux Containers (LXC)
2.2.23 Mellanox ConnectX Drivers
2.2.24 mlx4_core Conflicts Between the mlnx_en and ofa Packages
2.2.25 mlx4_ib Insertion Error when RDMA Starts
2.2.26 Oracle Clusterware Fails to Start on ASM Storage with SELinux Enabled
2.2.27 Oracle RDBMS Server 11gR2 Preinstall Settings Not Visible After Installation
2.2.28 Oracle VM 3.0 Guests Crash During Oracle Database Installation
2.2.29 Oracle VM 3.3.1 32-bit Guests with UEK R2 Panic
2.2.30 Paravirtualized Drivers in a Hardware Virtualized Guest
2.2.31 Post-Installation Anaconda Errors
2.2.32 RHCK Panics When an ext4 File System Is Defragmented
2.2.33 sched_yield() Settings for the Completely Fair Scheduler
2.2.34 Setting the Serial Console in a Hardware Virtualized Guest
2.2.35 Shared Receive Queue Panic
2.2.36 Support for crashkernel=auto with Xen
2.2.37 Support for Large Memory 32-bit Systems
2.2.38 Unable to Register Oracle Linux Guest with ULN
2.2.39 Unable to Register with ULN After First Reboot
2.2.40 XFS File System Corruption
2.2.41 xguest Package Not Installable with SELinux Disabled

The following sections describe known issues in this update.