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 Kdump fails on Oracle Server X7-2L SAN boot installation
2.2.2 Installation on an Aura7 NVMe device fails
2.2.3 Requirement for installing Oracle Linux 6.10 with UEFI support
2.2.4 Installer does not display Network Devices screen when installing with iSCSI enabled
2.2.5 Kickstart installation fails on multipath device when the ignoredisk --only-use option is used
2.2.6 Btrfs file system issues on UEK
2.2.7 Btrfs: Unable to replay log after snapshot is deleted and parent directory fsynced
2.2.8 Btrfs: Empty symbolic link after fsync of parent directory
2.2.9 Btrfs: Incorrect directory entries after fsync log replay
2.2.10 Btrfs: File loss on log replay after renaming file and running fsync
2.2.11 Btrfs: Kernel oops when unmounting during a quota rescan or disable
2.2.12 Btrfs, ext4, and XFS: kernel panic when freeze and unfreeze operations are performed on multiple threads
2.2.13 mkfs.ext4 does not support the documented -f option
2.2.14 XFS: Kernel panic in the multi-block buffer logging code
2.2.15 OFED iSER target login fails from an initiator on Oracle Linux 6
2.2.16 Kernel panic when booting into RHCK on a Btrfs root partition
2.2.17 DTrace Issues
2.2.18 Linux Containers Changes
2.2.19 avahi-daemon fails to start with UEK R2
2.2.20 Console appears to hang when booting
2.2.21 Default reverse path filtering mode affects certain Oracle products
2.2.22 Error message following first reboot on an HP ProLiant server
2.2.23 ext4: Inline data feature not available for UEK
2.2.24 xfsprogs 3.2.0 user space tool not supported on RHCK
2.2.25 gcc-libraries package replaced
2.2.26 Intel TCO watchdog timer messages
2.2.27 Mellanox ConnectX driver support
2.2.28 Oracle VM 3.0 guests crash during Oracle Database installation
2.2.29 Oracle VM 3.3.1 32-bit guests panic on UEK R2
2.2.30 Support for PV drivers in an HVM guest
2.2.31 RHCK panics when ext4 file system defragmented
2.2.32 Default sched_yield() settings for the Completely Fair Scheduler
2.2.33 Setting the serial console in an HV guest
2.2.34 Support for large memory 32-bit systems
2.2.35 Unable to register an Oracle Linux guest with ULN
2.2.36 Unable to register with ULN on first reboot after installing Oracle Linux 6
2.2.37 Booting from SAN installation fails using multipath on Pure Storage FlashArray

The following are known issues in this update.