Oracle® Linux

Release Notes for Unbreakable Enterprise Kernel Release 4 Update 6

Oracle Legal Notices
Oracle Documentation License

E92390-08

July 2019


Table of Contents

Preface
1 New Features and Changes
1.1 Notable Changes
1.2 Crypto API Improvements
1.3 DTrace Improvements
1.4 Xen Hypervisor Improvements
1.5 File System Improvements
1.6 Driver Updates
1.7 Technology Preview
1.8 Compatibility
1.9 Header Packages for Development
2 Fixed Issues
3 Known Issues
3.1 KVM guests with less than 4 GB of memory might fail to auto reserve crash kernel memory
3.2 btrfs, ext4 and xfs: Kernel panic when freeze and unfreeze operations are performed in multiple threads
3.3 btrfs Issues
3.4 ext4 Issues
3.5 xfs Issues
3.6 DIF/DIX is not supported for ext file systems
3.7 Console appears to hang when booting
3.8 Docker Issues
3.9 DTrace Issues
3.10 Error, some other host already uses address xxx.xxx.xxx.xxx
3.11 Increased dom0 memory requirement when using Mellanox HCAs on Oracle VM Server
3.12 LXC Issues
3.13 NVMe devices not found under the /dev directory after PCI rescan
3.14 OFED iSER target login fails from an initiator on Oracle Linux 6
3.15 Open File Description (OFD) locks are not supported on NFSv4 mounts
3.16 Oracle VM Server MSI-X interrupt allocation failure for 16 GB QLogic FC HBA
3.17 Possible kernel crash during manual unloading of QLogic FC HBA driver module
3.18 RDMA service is not set to start at boot time
3.19 SDP performance degradation
3.20 Shared Receive Queue (SRQ) is an experimental feature for RDS and is disabled by default
3.21 Unloading or removing the rds_rdma module is unsupported
4 Installation and Availability
4.1 Installation Overview
4.2 Subscribing to ULN Channels
4.3 Enabling Access to Oracle Yum Channels
4.4 Upgrading Your System
4.5 Installing the Oracle-Supported OFED Packages