Oracle® Linux 7

Release Notes for Oracle Linux 7 Update 4

Oracle Legal Notices
Oracle Documentation License


March 2020

Table of Contents

1 System Requirements and Limits
1.1 File System, Storage, and Address Space Limitations
2 Shipped Kernels
3 New Features and Changes
3.1 Booting
3.2 Desktop
3.3 Development Tools
3.4 File Systems
3.4.1 btrfs: Deprecated in RedHat Compatible Kernel (RHCK)
3.4.2 xfs: d_type support (ftype=1) enabled by default on newly formatted partitions
3.5 Installation
3.6 Kernel
3.6.1 Significant Changes to Kernel Entries and Parameters
3.7 Networking
3.8 Packaging
3.9 Security
3.10 Server and Services
3.11 Spacewalk Client Registration
3.12 Storage
3.12.1 Multipathing Improvements and Changes
3.13 Support Tools
3.14 Virtualization
3.15 Technology Preview
3.16 Compatibility
4 Fixed Issues
4.1 File Systems Issues Fixed
4.1.1 btrfs: UEK R3 incompatibility issue fixed
4.1.2 btrfs: Empty symbolic link after fsync of parent directory issue fixed
4.1.3 xfs: Kernel panic in multi-block buffer logging code issue fixed
4.1.4 btrfs: Kernel warning after snapshot is created with incorrect qgroup fixed
4.2 Co-Existing IPv4 and IPv6 VxLAN issue for UEK R4u2 fixed
4.3 kmod fixes for module compatibility checking
5 Known Issues
5.1 Installation Issues
5.1.1 Configuring Encryption and /boot During Installation
5.1.2 Network Installation
5.1.3 Installation on an iSCSI Disk
5.1.4 Installation on an HP 3PAR TPVV
5.1.5 Unable to boot after installation on systems using the Broadcom MegaRAID 9460 controller
5.2 Upgrade Issues
5.2.1 cgconfig and cgred packages must be restored separately
5.2.2 Postupgrade fails if web proxy is required
5.2.3 Using old version of yum causes dependency errors
5.3 Package Conflicts
5.3.1 rdma-core and infiniband-diags when installing oracle-ofed-release
5.3.2 dovecot-devel.i686 and dovecot-devel.x86_64
5.3.3 ipa-server-dns.x86_64 and freeipa-server-dns
5.3.4 ipa-admintools.x86_64 and freeipa-admintools
5.3.5 rear.x86_64 and rear.noarch
5.3.6 PackageKit.i686 and PackageKit.x86_64
5.3.7 sssd-common.i686 and sssd-common.x86_64
5.4 File System Related Bugs
5.4.1 AutoFS: AMD map browsable_dirs option does not work unless it is set in the [amd] section of autofs.conf
5.4.2 btrfs: Send operation causes soft lockup on large deduped file
5.4.3 btrfs, ext4 and xfs: Kernel panic when freeze and unfreeze operations are performed in multiple threads
5.4.4 btrfs: qgroup reserve space leaks
5.4.5 btrfs: Incorrect exclusive reference count after cloning file between subvolumes
5.4.6 btrfs: Kernel oops when unmounting during a quota rescan or disable
5.4.7 btrfs: Kernel oops when removing shared extents using qgroup accounting
5.4.8 ext4: System hangs on unmount after an append to a file with negative i_size
5.4.9 ext4: hang occurs during dynamic expansion of inode size
5.4.10 ext4: System hang when processing corrupted orphaned inode list
5.4.11 xfs: Oracle Linux 7 Update 4 is incompatible with UEK R3 where file systems are formatted using XFS with d_type enabled
5.4.12 xfs: Directory readahead completions can hang the system after unmount
5.4.13 xfs: System hangs on unmount after a buffered append to a file with negative i_size
5.4.14 xfs, ext4: IO error during DIO/AIO write results in disk content corruption
5.4.15 Ceph: SSL certificate verification error when accessing the Ceph Object Gateway in SSL mode
5.5 Automatic Bug Reporting Tool
5.6 Auto-completion of Commands in the bash Shell
5.7 crashkernel=auto setting on UEK R3
5.8 grubby sets incorrect saved entry
5.9 grubby fatal error upgrading Kernel when /boot is on a btrfs subvolume
5.10 Hebrew LaTeX fonts
5.11 InfiniBand Issues
5.11.1 ifup-ib: line 357: /sys/class/net/ib0/acl_enabled: Permission denied error
5.11.2 Kdump might fail due to an incorrect InfiniBand Adapter M3 Firmware version
5.11.3 Changing the IPoIB mode of an InfiniBand interface
5.11.4 Disabling an InfiniBand CA port generates warnings
5.12 Intel QuickAssist Acceleration Technology
5.13 Database installation and operation fails if RemoveIPC=yes is configured for systemd
5.14 Oracle ASM fails to initialize with SELinux in Enforcing mode
5.15 Multipath messages related to zram on UEK R3
5.16 Unable to create Oracle Linux 7 LXC containers on NFS
5.17 Oracle Linux 7 guests on Oracle VM and Xen
5.18 Hyper-V related services fail to start on Oracle Linux 7 Update 4 guest with UEK R4 kernel under Windows Hyper-V Server
5.19 Per-CPU Allocation Fails when Loading kvm_intel module with UEK R3
5.20 OpenSSH does not update login records with ssh client's host name
5.21 Geneve network driver support not available in UEK releases
5.22 net_prio control group not supported on UEK R3
5.23 NetworkManager fails to set the default gateway and route for interfaces configured with DHCP on UEK R3
5.24 NetworkManager unable to add IPv6 addresses to interfaces on UEK R3
5.25 Network connection icon reports incorrect state for interfaces
5.26 Power button defaults to ACPI Suspend
5.27 Cockpit web interface fails to display subscription status
5.28 32-bit RDMA packages are installed when upgrading a system with rdma-core installed
6 Installation and Availability
6.1 Upgrading from Oracle Linux 6
6.2 Oracle-Supported OFED Packages
6.2.1 Installing or Upgrading Oracle-Supported OFED Packages for UEK R4
6.2.2 Upgrading to Oracle Linux 7 Update 4 with the Oracle-Supported OFED Packages for UEK R4 installed
A Package Changes from the Upstream Release
A.1 Removed Packages
A.2 Modified Packages
A.3 New Packages
A.4 Modified Optional Packages
A.5 Packages Added by Oracle
B Removed Modules