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Oracle Corporation and its affiliates will not be responsible for any loss, costs, or damages incurred due to your access to or use of third-party content, products, or services. Alpha and Beta Draft Documentation Notice Disclaimer If this document is in preproduction status: This documentation is in preproduction status and is intended for demonstration and preliminary use only. It may not be specific to the hardware on which you are using the software. Oracle Corporation and its affiliates are not responsible for and expressly disclaim all warranties of any kind with respect to this documentation and will not be responsible for any loss, costs, or damages incurred due to the use of this documentation. E50738-03 January 2014 Abstract This document contains information on Oracle Linux Release 6 Update 5. This document may be updated after it is released. To check for updates to this document, and to view other Oracle documentation, refer to the Documentation section on the Oracle Technology Network (OTN) Web site: http://www.oracle.com/technology/documentation/ This document is intended for users and administrators of Oracle Linux. It describes potential issues and the corresponding workarounds you may encounter while using Oracle Linux. Oracle recommends that you read this document before installing or upgrading Oracle Linux. Document generated on: 2014-01-02 (revision: 1549) _______________________________________________________ Preface The Oracle Linux Release Notes provides a summary of the new features, changes, and fixed and known issues in Oracle Linux Release 6 Update 5. Audience This document is written for system administrators who want to install or update Oracle Linux. It is assumed that readers have a general understanding of the Linux operating system. Document Organization The document is organized as follows: * Chapter 1, "New Features and Changes" contains a summary of the new features and changes in this release. * Chapter 2, "Fixed and Known Issues" contains details of the fixed and known issues with the software. * Chapter 3, "Upgrading to Oracle Linux 6 Update 5 " contains information about how to install updates on your system. Documentation Accessibility For information about Oracle's commitment to accessibility, visit the Oracle Accessibility Program website at http://www.oracle.com/pls/topic/lookup?ctx=acc&id=docacc. Access to Oracle Support Oracle customers have access to electronic support through My Oracle Support. For information, visit http://www.oracle.com/pls/topic/lookup?ctx=acc&id=info or visit http://www.oracle.com/pls/topic/lookup?ctx=acc&id=trs if you are hearing impaired. Related Documents The latest version of this document and other documentation for this product are available at: http://www.oracle.com/technetwork/server-storage/linux/documentati on/index.html. Conventions The following text conventions are used in this document: Convention Meaning boldface Boldface type indicates graphical user interface elements associated with an action, or terms defined in text or the glossary. italic Italic type indicates book titles, emphasis, or placeholder variables for which you supply particular values. monospace Monospace type indicates commands within a paragraph, URLs, code in examples, text that appears on the screen, or text that you enter. Chapter 1. New Features and Changes This chapter describes the new features that are introduced by Oracle Linux 6 Update 5. 1.1. Supported Kernels Oracle Linux 6 Update 5 ships with three sets of kernel packages: * Unbreakable Enterprise Kernel Release 2 (kernel-uek-2.6.39-400.211.1.el6uek) for i386 * Unbreakable Enterprise Kernel Release 3 (kernel-uek-3.8.13-16.2.1.el6uek) for x86-64 * Red Hat Compatible Kernel (kernel-2.6.32-431.el6) for i386 and x86-64 By default, both the Unbreakable Enterprise Kernel and the Red Hat Compatible Kernel for the specific architecture (i386 or x86-64) are installed and the system boots the Unbreakable Enterprise Kernel. The ISO image for Oracle Linux 6 Update 5 for i386 includes the Red Hat Compatible Kernel and the Unbreakable Enterprise Kernel Release 2 but not the Unbreakable Enterprise Kernel Release 3, which does not support i386. The ISO image for Oracle Linux 6 Update 5 for x86-64 includes the Red Hat Compatible Kernel and the Unbreakable Enterprise Kernel Release 3 but not the Unbreakable Enterprise Kernel Release 2. To make your system boot the Red Hat Compatible Kernel by default: 1. Edit /etc/grub.conf and change the value of the default parameter to indicate the Red Hat Compatible Kernel. (Each entry for a bootable kernel in the file starts with a title definition. The entries are effectively numbered from 0 upwards, where 0 corresponds to the first entry in the file, 1 to the second entry, and so on. To view the GRUB manual, use the info grub command.) 2. Edit /etc/sysconfig/kernel and change the setting for the default kernel package type from DEFAULTKERNEL=kernel-uek to DEFAULTKERNEL=kernel. 1.2. Unbreakable Enterprise Kernel Release 2 The Unbreakable Enterprise Kernel Release 2 (UEK R2) is based on the upstream kernel 3.0.36 stable source tree. The Unbreakable Enterprise Kernel supports a wide range of hardware and devices. In close cooperation with hardware and storage vendors, a number of device drivers have been updated by Oracle in the 2.6.39-400 kernel. For details, see the following release notes: * Oracle Linux Unbreakable Enterprise Kernel Release 2 Quarterly Update 5 Release Notes (http://docs.oracle.com/cd/E37670_01/E48381/html/index.html) * Oracle Linux Unbreakable Enterprise Kernel Release 2 Quarterly Update 4 Release Notes (http://docs.oracle.com/cd/E37670_01/E41136/html/index.html) * Oracle Linux Unbreakable Enterprise Kernel Release 2 Quarterly Update 3 Release Notes (http://docs.oracle.com/cd/E37670_01/E39869/html/index.html) 1.3. Unbreakable Enterprise Kernel Release 3 The Unbreakable Enterprise Kernel Release 3 (UEK R3) is based on the upstream kernel 3.8.13 stable source tree. For more information about UEK R3, see the Oracle Linux Unbreakable Enterprise Kernel Release 3 Release Notes (http://docs.oracle.com/cd/E37670_01/E48380/html/index.html). A very large number of changes have taken place in mainline Linux between 3.0.x, on which UEK R2 is based, and 3.8.13, on which UEK R3 is based. For details of all these changes, see the kernel change logs that the Linux Kernel Newbies maintain at http://kernelnewbies.org/LinuxVersions. 1.3.1. Notable New Features of UEK R3 UEK R3 includes the following major improvements over UEK R2: * Integrated DTrace support in the UEK R3 kernel and user-space tracing of DTrace-enabled applications. * Device mapper support for an external, read-only device as the origin for a thinly-provisioned volume. * The loop driver provides the same I/O functionality as dm-nfs by extending the AIO interface to perform direct I/O. To create the loopback device, use the losetup command instead of dmsetup. The dm-nfs module is not provided with UEK R3. * Btrfs send and receive subcommands allow you to record the differences between two subvolumes, which can either be snapshots of the same subvolume or parent and child subvolumes. * Btrfs quota groups (qgroups) allow you to set different size limits for a volume and its subvolumes. * Btrfs supports replacing devices without unmounting or otherwise disrupting access to the file system. * Ext4 quotas are enabled as soon as the file system is mounted. * TCP controlled delay management (CoDel) is a new active queue management algorithm that is designed to handle excessive buffering across a network connection (bufferbloat). The algorithm is based on for how long packets are buffered in the queue rather than the size of the queue. If the minimum queuing time rises above a threshold value, the algorithm discards packets and reduces the transmission rate of TCP. * TCP connection repair implements process checkpointing and restart, which allows a TCP connection to be stopped on one host and restarted on another host. Container virtualization can use this feature to move a network connection between hosts. * TCP and STCP early retransmit allows fast retransmission (under certain conditions) to reduce the number of duplicate acknowledgements. * TCP fast open (TFO) can speed up the opening of successive TCP connections between two endpoints by eliminating one round time trip (RTT) from some TCP transactions. * The TCP small queue algorithm is another mechanism intended to help deal with bufferbloat. The algorithm limits the amount of data that can be queued for transmission by a socket. * The secure computing mode feature (seccomp) is a simple sandbox mechanism that, in strict mode, allows a thread to transition to a state where it cannot make any system calls except from a very restricted set (_exit(), read(), sigreturn(), and write()) and it can only use file descriptors that were already open. In filter mode, a thread can specify an arbitrary filter of permitted systems calls that would be forbidden in strict mode. Access to this feature is by using the prctl() system call. For more information, see the prctl(2) manual page. * The OpenFabrics Enterprise Distribution (OFED) 2.0 stack supports the following protocols: + SCSI RDMA Protocol (SRP) enables access to remote SCSI devices via remote direct memory access (RDMA) + iSCSI Extensions for remote direct memory access (iSER) provide access to iSCSI storage devices + Reliable Datagram Sockets (RDS) is a high-performance, low-latency, reliable connectionless protocol for datagram delivery + Sockets Direct Protocol (SDP) supports stream sockets for RDMA network fabrics + Ethernet over InfiniBand (EoIB) + IP encapsulation over InfiniBand (IPoIB) + Ethernet tunneling over InfiniBand (eIPoIB) The OFED 2.0 stack also supports the following RDS features: + Async Send (AS) + Quality of Service (QoS) + Automatic Path Migration (APM) + Active Bonding (AB) + Shared Request Queue (SRQ) + Netfilter (NF) * Paravirtualization support has been enabled for Oracle Linux guests on Windows Server 2008 Hyper-V or Windows Server 2008 R2 Hyper-V. * The Virtual Extensible LAN (VXLAN) tunneling protocol overlays a virtual network on an existing Layer 3 infrastructure to allow the transfer of Layer 2 Ethernet packets over UDP. This feature is intended for use by a virtual network infrastructure in a virtualized environment. Use cases include virtual machine migration and software-defined networking (SDN). Note The kernel version in UEK R3 is based on the mainline Linux kernel version 3.8.13. Low-level system utilities that expect the kernel version to start with 2.6 can run without change if they use the UNAME26 personality (for example, by using the uname26 wrapper utility, which is available in the uname26 package). For more information about the new functionality that UEK R3 provides, see the Oracle Linux Unbreakable Enterprise Kernel Release 3 Release Notes (http://docs.oracle.com/cd/E37670_01/E48380/html/index.html). 1.4. FUSE Mount Option The FUSE module in both UEK R2 and UEK R3 has been enhanced to improve scalability of application throughput on NUMA systems as the number of threads or processes that are accessing FUSE-based file systems increases. To select the new code paths, specify the numa mount option when mounting FUSE-based file systems on NUMA systems. This feature is available in UEK R2 from 2.6.39-400.107.0 onwards and in all versions of UEK R3. 1.5. Notable New Security Features The following notable security features are included in this update: * Applications such as Java and OpenSSL are now able to share a cryptographic data store that crypto toolkits can use for processing trusted certificates. * Smartcard authentication support in a larger number of application subsystems for single sign on (SSO). * Updated version of OpenSCAP to comply with the certification requirements of NIST SCAP 1.2. * Updated Transport Layer Security (TLS 1.2) support. 1.6. Technology Preview Features Technology Preview features are still under development but are made available for testing and evaluation purposes and to give the features wider exposure. These features are not supported under Oracle Linux support subscriptions and are not suitable for production use. The following Technology Preview features are currently not supported under Oracle Linux 6 and might not be functionally complete: * DIF/DIX support for SCSI * FS-Cache * fsfreeze * IPv6 support in IPVS * LVM API * LVM RAID support * Matahari * Open multicast ping (omping) * System Information Gatherer and Reporter (SIGAR) * Trusted Platform Module (TPM) * Trusted Boot * vios-proxy 1.6.1. Technology Preview Features in UEK R2 The following technology preview features are provided with UEK R2: * DTrace (Oracle Linux 6 and x86-64 only) DTrace is a comprehensive dynamic tracing framework that was initially developed for the Oracle Solaris operating system and which is being ported to Linux by Oracle. DTrace provides a powerful infrastructure to permit administrators, developers, and service personnel to concisely answer arbitrary questions about the behavior of the operating system and user programs in real time. DTrace feature previews are published as a separate set of kernel packages in UEK R2. DTrace support is integrated with the kernel in the UEK R3 distribution, where it is available as a supported feature for subscribers to ULN. * Distributed Replicated Block Device (Oracle Linux 6 only) Distributed Replicated Block Device (DRBD) shared-nothing, synchronously replicated block device (RAID1 over network), designed to serve as a building block for high availability (HA) clusters. It requires a cluster manager (for example, pacemaker) to implement automatic failover. * Kernel module signing facility Applies cryptographic signature checking to modules on module load, checking the signature against a ring of public keys compiled into the kernel. GPG is used to do the cryptographic work and determines the format of the signature and key data. The kernel module signing facility is a supported feature in the UEK R3 distribution. * Linux Containers (Oracle Linux 6 and x86-64 only) Based on the Linux cgroups and name spaces functionality, Linux Containers (LXC) allow you to safely and securely run multiple applications or instances of an operating system on a single host without risking them interfering with each other. Containers are lightweight and resource-friendly, which saves both rack space and power. In order to get started with containers, you need to install the lxc package, which is included in the package repository of the Unbreakable Enterprise Kernel. LXC is a supported feature in the UEK R3 distribution. * Transcendent memory Transcendent Memory (tmem) provides a new approach for improving the utilization of physical memory in a virtualized environment by claiming underutilized memory in a system and making it available where it is most needed. From the perspective of an operating system, tmem is fast pseudo-RAM of indeterminate and varying size that is useful primarily when real RAM is in short supply. To learn more about this technology and its use cases, see the Transcendent Memory project page on oss.oracle.com: http://oss.oracle.com/projects/tmem/ 1.6.2. Technology Preview Features in UEK R3 The following technology preview features are provided with UEK R3: * Distributed Replicated Block Device Distributed Replicated Block Device (DRBD) shared-nothing, synchronously replicated block device (RAID1 over network), designed to serve as a building block for high availability (HA) clusters. It requires a cluster manager (for example, pacemaker) to implement automatic failover. * Transcendent memory Transcendent Memory (tmem) provides a new approach for improving the utilization of physical memory in a virtualized environment by claiming underutilized memory in a system and making it available where it is most needed. From the perspective of an operating system, tmem is fast pseudo-RAM of indeterminate and varying size that is useful primarily when real RAM is in short supply. To learn more about this technology and its use cases, see the Transcendent Memory project page on oss.oracle.com: http://oss.oracle.com/projects/tmem/ 1.6.3. Technology Preview Features in RHCK The following Technology Preview features are available when running the Red Hat Compatible Kernel (RHCK): * Btrfs file system * Closed Process Group (CPG) API for inter-node locking * Corosync redundant ring with autorecovery * corosync-cpgtool dual-ring configuration * Cross Realm Kerberos Trust Functionality (relies on samba4 client library) * fence_ipmilan agent diagnostic pulse * fence_sanlock agent for luci * FUSE (Filesystem in Userspace) * keepalived daemon for network load balancing and high availability * Kerberos v1.10 DIR cache storage type to handle TGTs for multiple KDCs * Kernel Media support * libqb library for high performance logging, tracing, inter-process communication, and polling by Pacemaker * Linux Containers (LXC) * LVM metadata dynamic aggregation (using lvmetad daemon) * LVM support for thinly-provisioned snapshots (single system only) * LVM support for thinly-provisioned logical volumes (single system only) * Pacemaker high-availability cluster manager * pcs utility for cluster configuration and management * Precision Time Protocol (PTP) linuxptp implementation * PTP kernel driver support * QFQ queuing discipline * rgmanager support for disabling via /etc/cluster.conf * Thin-provisioning and scalable snapshots * trousers and tpm-tools packages that support Trusted Platform Module (TPM) hardware Note Btrfs and FUSE are supported features in the UEK R2 and UEK R3 distributions. LXC is a supported feature in the UEK R3 distribution. Chapter 2. Fixed and Known Issues This chapter describes the fixed and known issues for Oracle Linux 6 Update 5. Important Run the yum update command regularly to ensure that the latest bug fixes and security errata are installed on your system. For details of the fixed and known issues with the Unbreakable Enterprise Kernel Release 3, see the Oracle Linux Unbreakable Enterprise Kernel Release 3 Release Notes (http://docs.oracle.com/cd/E37670_01/E48380/html/index.html). For details of the fixed and known issues with the Unbreakable Enterprise Kernel Release 2 Quarterly Update 5, see the Oracle Linux Unbreakable Enterprise Kernel Release 2 Quarterly Update 5 Release Notes (http://docs.oracle.com/cd/E37670_01/E48381/html/index.html). 2.1. Fixed Issues The following major issues are fixed in this update: Kernel Panic with Emulex LPe16XXX and Sun Storage FCoE Adapters A kernel panic could occur at boot time if an Emulex LPe16XXX FCoE adapter or a Sun Storage version of such an adapter was installed and the lpfc driver was not updated to version 0:8.3.7.10.4p or later. The version of the lpfc driver provided in this update corrects the issue. X Window System Does Not Run in a PVHVM Guest If you installed an Oracle Linux 6 Update 5 (x86-64) PVHVM guest with either the Desktop or the Software Development Workstation installation options, the X Window System was not accessible after installation when you booted the guest into run level 5. This problem was seen in OVM 3.0 and later. The workaround was to boot the guest into run level 3 and uninstall the xorg-x11-drv-cirrus package before switching to run level 5. The issue is fixed in xorg-x11-drv-cirrus-1.5.2-1.el6_4.x86_64.rpm or later versions of this package. (Bug ID 16280196) 2.2. Known Issues This section describes known issues in this update. Booting UEK R2 as a 32-bit PVHVM Guest When booting UEK R2 as a 32-bit PVHVM guest, you can safely ignore the kernel message register_vcpu_info failed: err=-38, which might be displayed. (Bug ID 13713774) Broadcom NetXtreme II 10Gbps Network Adapter Driver When using the bnx2x driver in a bridge, disable Transparent Packet Aggregation (TPA) by including options bnx2x disable_tpa=1 in /etc/modprobe.conf. (Bug ID 14626070) Btrfs File System Issues For a description of the known issues for btrfs with Unbreakable Enterprise Kernel Release 3, see the Oracle Linux Unbreakable Enterprise Kernel Release 3 Release Notes (http://docs.oracle.com/cd/E37670_01/E48380/html/index.html). For a description of the known issues for btrfs with Unbreakable Enterprise Kernel Release 2 Quarterly Update 5, see the Oracle Linux Unbreakable Enterprise Kernel Release 2 Quarterly Update 5 Release Notes (http://docs.oracle.com/cd/E37670_01/E48381/html/index.html). Console Appears to Hang when Booting On some hardware, the console may appear to hang during the boot process after starting udev. However, the system does boot properly and is accessible. A workaround to this problem is to add nomodeset as a kernel boot parameter in /etc/grub.conf. (Bug ID 10094052, 13485328) Default I/O Scheduler For the Unbreakable Enterprise Kernel, deadline is the default I/O scheduler. For the Red Hat Compatible Kernel, cfq is the default I/O scheduler. Default NFS Mount Options The default NFS mount option has changed to NFS v4. To mount an NFS v3 volume (the default in Oracle Linux 5), use the following mount options: -o vers=3,mountproto=tcp Default Reverse Path Filtering Mode Affects Certain Oracle Products Oracle Linux 6 defaults to reverse path filtering in strict mode. Some Oracle products and network storage devices work more reliably with reverse path filtering in loose mode. To enable loose mode, issue the following command (where iface is the network interface, for example, eth1). # sysctl net.ipv4.conf.iface.rp_filter=2 The default setting is 1 for strict mode. (Bug ID 10649976) DTrace Issues * If you want to use the DTrace-enabled version of the UEK R2 kernel, subscribe your system to the Dtrace for Oracle Linux 6 (x86_64) - Latest channel (ol6_x86_64_Dtrace_latest) but not to the Oracle Linux 6 Dtrace Userspace Tools (x86_64) - Latest channel (ol6_x86_64_Dtrace_userspace_latest). The ol6_x86_64_Dtrace_userspace_latest channel is provided for use with UEK R3 and installs that kernel as a dependency. * Using kill -9 to terminate dtrace can leave breakpoints outstanding in processes being traced, which might sooner or later kill them. * Argument declarations for probe definitions cannot be declared with derived types such as enum, struct, or union. * The following compiler warning can be ignored for probe definition arguments of type string (which is a D type but not a C type): provider_def.h:line#: warning: parameter names (without types) in fun ction declaration * The vtimestamp() function does not return a correct value. (Bug ID 17741477) Enabling FIPS Mode To make an Oracle Linux Release 6 Update 5 system compliant with Federal Information Processing Standard (FIPS) Publication 140-2, perform the following steps: 1. Install the dracut-fips package: # yum install dracut-fips 2. Recreate the initramfs file system: # dracut -f 3. Identify either the device file path (device) under /dev of your system's boot device or its UUID (uuid) by using ls -l to examine the entries under /dev/disk/by-uuid. 4. Add either a boot=device entry or a boot=UUID=uuid entry for the boot device to the kernel command line in /etc/grub.conf. 5. Add a fips=1 entry to the kernel command line in /etc/grub.conf to specify strict FIPS compliance. 6. Disable prelinking by setting PRELINKING=no in /etc/sysconfig/prelink. 7. Remove all existing prelinking from binaries and libraries: # prelink -ua 8. Install the openssh-server-fips and openssh-client-fips packages and their dependent packages: # yum install openssh-server-fips openssh-client-fips 9. Shut down and reboot the system. Note If you specify fips=1 on the kernel command line but omit a valid boot= entry, the system crashes because it cannot locate the kernel's .hmac file. If you do not disable and remove all prelinking, users cannot log in and /usr/sbin/sshd does not start. (Bug ID 17759117, 17776875) Error message Following First Reboot on an HP ProLiant Server You might see a message similar to the following during the first reboot of an HP ProLiant server: [Firmware Bug]: the BIOS has corrupted hw-PMU resources (MSR 186 is 4 3003c) You can safely ignore this message. The functionality and performance of the operating system and the server are not affected. Incorrect Package Count Selecting all packages in certain groups during installation might not show the correct package count. (Bug ID 11684244) iTCO_wdt Errors If you see the following boot-time dmesg error with the UEK R2: iTCO_wdt: failed to reset NO_REBOOT flag, device disabled by hardware /BIOS add the line blacklist iTCO_wdt to /etc/modprobe.d/blacklist-watchdog. Journal Corruption in Virtualized Systems On virtualized systems that are built on Xen version 3, including all releases of Oracle VM 2 including 2.2.2 and 2.2.3, disk synchronization requests for ext3 and ext4 file systems result in journal corruption with kernel messages similar to the following being logged: blkfront: barrier: empty write xvda op failed blkfront: xvda: barrier or flush: disabled In addition, journal failures such as the following might be reported: Aborting journal on device xvda1 The workaround is to add the mount option barrier=0 to all ext3 and ext4 file systems in the guest VM before upgrading to UEK R3. For example, you would change a mount entry such as: UUID=4e4287b1-87dc-47a8-b69a-075c7579eaf1 / ext3 defaults 1 1 so that it reads: UUID=4e4287b1-87dc-47a8-b69a-075c7579eaf1 / ext3 defaults,barrier= 0 1 1 This issue does not apply to Xen 4 based systems, such as Oracle VM 3. (Bug ID 17310816, 17313428) Kdump Service Configuration By default, the Kernel Dump service (Kdump) is enabled but not configured. The following boot-time message indicates that Kdump needs to be configured. kdump: No crashkernel parameter specified for running kernel To prevent this message from being displayed, use the Kernel Dump Configuration GUI (system-config-kdump) to configure or disable Kdump. (Bug ID 16242031) When configuring a crashkernel setting for the UEK, only standard settings such as crashkernel=128M@32M are supported. Settings such as crashkernel=auto, which can be used with the Red Hat Compatible Kernel, are not supported by the UEK and cause Kdump to fail to start. (Bug ID 13495212) Linux Containers 32-bit Support The Linux Containers package (lxc) is not available for the i386 architecture. Linux Containers Interoperability with SELinux The correct operation of containers might require that you completely disable SELinux on the host system. For example, SELinux can interfere with container operation under the following conditions: * Running the halt or shutdown command from inside the container hangs the container or results in a permission denied error. (An alternate workaround is to use the init 0 command from inside the container to shut it down.) * Setting a password inside the container results in a permission denied error, even when run as root. * You want to allow ssh logins to the container. ssh logins are possible with SELinux enabled if you install the lxc-0.9.0-2.0.5 package (or later version of this package). To disable SELinux on the host: 1. Edit the configuration file for SELinux, /etc/selinux/config and set the value of the SELINUX directive to disabled. 2. Shut down and reboot the host system. (Bug ID 15967411) Linux Containers Default Configuration Location The default location for a container's configuration has changed from /etc/lxc/name to /container/name in lxc 0.8.0 onward. To start a container that you created with a previous update of Oracle Linux, specify the -f option to lxc-start, for example: # lxc-start -n ol6u3 -f /etc/lxc/ol6u3/config To convert an existing container to use the new location: 1. Move the container's configuration directory to /container/name: # mv /etc/lxc/name /container 2. Edit the /container/name/config file and change the values of any lxc.rootfs and lxc.mount parameters to refer to /container instead of /etc/lxc. For example, if the config file contained the following entries: lxc.rootfs = /etc/lxc/example/rootfs lxc.mount.entry=/lib /etc/lxc/example/rootfs/lib none ro,bind 0 0 lxc.mount.entry=/usr/lib /etc/lxc/example/rootfs/usr/lib none ro,bind 0 0 lxc.mount.entry=/lib64 /etc/lxc/example/rootfs/lib64 none ro,bind 0 0 lxc.mount.entry=/usr/lib64 /etc/lxc/example/rootfs/usr/lib64 none ro, bind 0 0 you would change these entries to read: lxc.rootfs = /container/example/rootfs lxc.mount.entry=/lib /container/example/rootfs/lib none ro,bind 0 0 lxc.mount.entry=/usr/lib /container/example/rootfs/usr/lib none ro,bi nd 0 0 lxc.mount.entry=/lib64 /container/example/rootfs/lib64 none ro,bind 0 0 lxc.mount.entry=/usr/lib64 /container/example/rootfs/usr/lib64 none r o,bind 0 0 After converting the container, you do not need to specify the -f option to lxc-start. (Bug ID 15967411) Mellanox ConnectX Drivers The Mellanox ConnectX core, Ethernet, and InfiniBand drivers are supported only for the x86-64 architecture. (Bug ID 16228063) mlx4_core Conflicts Between the mlnx_en and ofa Packages Both the mlnx_en and ofa packages contain mlx4_core. Only one of these packages should be installed. Attempting to install both packages on a single server results in a package conflict error. If you have a Mellanox Ethernet Controller, install mlnx_en. If you have a Mellanox InfiniBand Controller, install ofa. If your system has both controllers, use ofa as it supports both the Ethernet and InfiniBand controllers. Oracle Clusterware Fails to Start on ASM Storage with SELinux Enabled If the SELinux policy packages have not been updated recently, Cluster Ready Services (CRS) might fail to start with messages such as the following in /var/log/messages: SELinux is preventing /usr/lib/oracleasm/oracleasm-instantiate-disk f rom associate access on the filesystem DATA1. The solution is to upgrade the selinux-policy and selinux-policy-targeted packages to ensure that you are running a version no earlier than 3.7.195.0.1.el6_4.5: # yum update 'selinux-policy*' After upgrading the packages, reboot the system. (Bug ID 13925445) Oracle RDBMS Server 11gR2 Preinstall Settings Not Visible After Installation On an x86-64 system, if you install the pam.i386 package either manually or via a package dependency, and the oracle-rdbms-server-11gR2-preinstall package is also selected, this overwrites the settings for Oracle Database in /etc/security/limits.conf. This is most likely to occur during a Kickstart-automated installation that includes non-standard packages. To restore the settings, run the oracle-rdbms-server-11gR2-preinstall-verify script. (Bug ID 14212822) Oracle VM 3.0 Guests Crash During Oracle Database Installation PVHVM guests on Oracle VM 3.0 crash during Oracle Database installation if the value of the maximum memory (maxmem) parameter set for the guest is greater than the amount specified at boot time (memory). To avoid this issue, ensure that the values of the maxmem and memory parameters are the same. This issue has been resolved in Oracle VM 3.1.1. (Bug ID 13396734) Paravirtualized Drivers in a Hardware Virtualized Guest The Unbreakable Enterprise Kernel adds support for PV drivers in a HVM guest (PVHVM) on Oracle VM. The default is to present only PV drivers when running in an HVM guest. To run kernel-uek fully hardware virtualized, including the drivers, add the parameter xen_emul_unplug=never to the boot parameters in /etc/grub.conf, for example: kernel /vmlinuz-2.6.32-300.2.1.el6uek ro root=/dev/VolGroup00/LogVol0 0 xen_emul_unplug=never Adding this parameter makes the kernel also present the emulated drivers as previously (for example, the 8139cp network driver). Post-Installation Anaconda Errors In certain cases, after successfully completing installation and rebooting the system, it is possible for errors such as the following to occur: Error in sys.excepthook: Traceback (most recent call last): File "/usr/lib/python2.6/site-packages/meh/handler.py", line 161, in (lambda) File "/usr/lib/anaconda/exception.py", line 44, in handleException File "/usr/lib/python2.6/site-packages/meh/handler.py", line 106, in handleException File "/usr/lib/anaconda/gui.py", line 1169, in mainExceptionWindow ImportError: No module named ui.gui 14:05:55 CRITICAL: anaconda 11.5.0.47 exception report Traceback (most recent call first): File "/usr/lib64/python2.6/site-packages/gtk-2.0/gtk/_lazyutils.py" , line 32, in __ getattr__ File "/usr/lib/anaconda/gui.py", line 1453, in keyRelease if ((event.keyval == gtk.keysyms.KP_Delete ImportError: No module named keysyms These errors can safely be ignored. Receive Packet Steering Errors Certain network operations that utilize receive packet steering could cause errors on the system. (Bug ID 11071685) sched_yield() Settings for the Completely Fair Scheduler For the Unbreakable Enterprise Kernel, the default setting is kernel.sched_compat_yield=1. For the Red Hat Compatible Kernel, the default setting is kernel.sched_compat_yield=0. Setting the Serial Console in a Hardware Virtualized Guest To set the serial console in a hardware virtualized guest, use following settings in the guest: * Add the following parameters to the kernel boot line in /etc/grub.conf: console=tty0 console=ttyS0,57600n8 * Add the following line to /etc/securetty: ttyS0 Spurious Udev Messages During Failed Path Restoration If failed paths are restored in a multipath configuration, you might see udevd-work error messages in /var/log/messages. The failed paths are restored despite these messages, which you can ignore. (Bug ID 11682171) Support for Large Memory 32-bit Systems Releases of Oracle Linux prior to Oracle Linux 5 supplied a hugemem kernel to allow a system to address up to 64 GB of memory in 32-bit mode. The hugemem kernel is no longer available in Oracle Linux 5 and later releases. The Unbreakable Enterprise Kernel (UEK) supports a maximum of 16 GB of memory for 32-bit kernels on bare metal and hardware virtualized machine (HVM) systems, and 8 GB for fully paravirtualized machine (PVM) systems. 32-bit PVM guest operating systems must be located in the first 128 GB of physical memory on the host. The Red Hat Compatible Kernel (RHCK) has the same limitations, except that PVM systems can have up to 16 GB of memory. The limitation of 8 GB for PVM on UEK was chosen for reasons of reliability. A 32-bit system uses the PAE (physical address extension) memory feature to map physical memory beyond 4 GB into the 32-bit address space that is available to each process. A 64-bit system can address memory beyond 4 GB without requiring an extra layer of memory abstraction. Oracle Linux on x86-64 includes 32-bit libraries, which allow applications built for both 64-bit and 32-bit Linux to run on the same system. This capability provides scalability to virtually unlimited memory sizes, while retaining the ability to run 32-bit applications. Oracle recommends this configuration for any system with more than 4 GB of memory. (Bug ID 16974301) udevd Message A message similar to the following might be recorded in dmesg or /var/log/messages at boot time: udevd (pid): /proc/pid/oom_adj is deprecated, please use /proc/pid/oo m_score_adj instead. The udevd process uses the deprecated oom_adj kernel interface to prevent it from being killed if the system runs short of memory. You can safely ignore the message as the action still succeeds. To prevent the message from occurring, install the package udev-147-2.42.el6.arch.rpm or higher. (Bug ID 13655071, 13712009) Unable to Register Oracle Linux Guest with ULN Registering an Oracle Linux guest running under Virtual Box with the Unbreakable Linux Network (ULN) might fail with a server communication error. The workaround is to run the following command as root on the guest: # echo "uuid=`uuidgen -t`" >> /etc/sysconfig/rhn/up2date You can then run uln_register again. (Bug ID 14696776) Unable to Register with ULN After First Reboot Following the first reboot after installing Oracle Linux 6, you are prompted to register your system with ULN. If you did not configure your network during the installation, the registration process to ULN cannot succeed. To register your system, log in as root, configure the system's network manually, and run uln_register. xguest Package Not Installable with SELinux Disabled If the xguest package fails to install with a PREIN script error, enable SELinux by setting SELINUX=enforcing in /etc/selinux/config, reboot the system, and reinstall the xguest package. (Bug ID 13495388) Chapter 3. Upgrading to Oracle Linux 6 Update 5 This chapter describes how to upgrade your system to Oracle Linux 6 Update 5. 3.1. Supported Upgrade Paths On i386 systems, upgrading from Oracle Linux 6 GA, Update 1, Update 2, Update 3, or Update 4 is supported for the Unbreakable Enterprise Kernel Release 2 and the Red Hat Compatible Kernel. The Unbreakable Enterprise Kernel Release 3 is not supported on the i386 architecture. On x86-64 systems, upgrading from Oracle Linux 6 GA, Update 1, Update 2, Update 3, or Update 4 is supported for the Unbreakable Enterprise Kernel Release 2, the Unbreakable Enterprise Kernel Release 3, and the Red Hat Compatible Kernel. Upgrading from a beta release is not supported. In-place upgrading from a major version of Oracle Linux 5 or earlier is not supported. Although Anaconda provides an option to perform an upgrade, fresh installation is strongly recommended. If you have an Oracle Linux 5.8 system, you can use new features in the Unbreakable Enterprise Kernel Release 2 without upgrading to Oracle Linux 6 as Oracle Linux 5.8 includes the Unbreakable Enterprise Kernel Release 2. You cannot use features from the Unbreakable Enterprise Kernel Release 3 as this kernel is not available for Oracle Linux 5.8. 3.2. Obtaining Oracle Linux 6 Update 5 Packages You can download a full Oracle Linux installation media image from the Oracle Software Delivery Cloud at http://edelivery.oracle.com/linux. You can also obtain Oracle Linux packages from the Unbreakable Linux Network (ULN) and the Oracle Public Yum server. 3.2.1. About the Unbreakable Linux Network You have the option of registering a system with ULN when you install Oracle Linux 6 on a system. To register with ULN after installation, use the uln_register command. To obtain Oracle Linux updates from ULN, you must have an Oracle Linux support subscription. For more information about ULN, see http://linux.oracle.com. During ULN registration, your server is automatically registered with the latest channels for the base repository, the Unbreakable Enterprise Kernel Release 2, and Unbreakable Enterprise Kernel Release 3 (x86-64 only). If you upgrade an x86-64 system and want to install the Unbreakable Enterprise Kernel Release 3, you must manually subscribe the system to the Unbreakable Enterprise Kernel Release 3 latest channel and unsubscribe the server from the Unbreakable Enterprise Kernel Release 2 latest channel before running yum update. ULN also provides channels for Oracle-specific software packages such as Oracle's ASMlib user-space package and the Oracle Instant Client. To enable access to these packages, log in to ULN and subscribe your system to the Oracle Software channel. 3.2.2. About Public Yum Oracle also provides all errata and updates for Oracle Linux via the Public Yum service, which includes updates to the base distribution, but does not include Oracle-specific software. You do not require an Oracle Linux support subscription to use this service. For more information on how to obtain updates from Public Yum, see http://public-yum.oracle.com. By default, all new installations of Oracle Linux 6 Update 5 are automatically configured to use the public yum update service. If you subsequently register the system with ULN, the public yum service is automatically disabled. The following entries in the /etc/yum.repos.d/public-yum-ol6.repo file enable you to download the latest available packages for Oracle Linux 6 and the Unbreakable Enterprise Kernel Release 2: [ol6_latest] name=Oracle Linux $releasever Latest ($basearch) baseurl=http://public-yum.oracle.com/repo/OracleLinux/OL6/latest/$bas earch/ gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-oracle gpgcheck=1 enabled=1 [ol6_UEK_latest] name=Latest Unbreakable Enterprise Kernel for Oracle Linux $releaseve r ($basearch) baseurl=http://public-yum.oracle.com/repo/OracleLinux/OL6/UEK/latest/ $basearch/ gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-oracle gpgcheck=1 enabled=1 The following entries in the /etc/yum.repos.d/public-yum-ol6.repo file enable you to download the latest available packages for Oracle Linux 6 and the Unbreakable Enterprise Kernel Release 3: [ol6_latest] name=Oracle Linux $releasever Latest ($basearch) baseurl=http://public-yum.oracle.com/repo/OracleLinux/OL6/latest/$bas earch/ gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-oracle gpgcheck=1 enabled=1 [ol6_UEKR3_latest] name=Latest Unbreakable Enterprise Kernel Release 3 for Oracle Linux $releasever ($basearch) baseurl=http://public-yum.oracle.com/repo/OracleLinux/OL6/UEKR3/lates t/$basearch/ gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-oracle gpgcheck=1 enabled=1 Note The ol6_UEKR3_latest repository is not available for i386 systems. If you want to install packages from the playground or OFED repositories, add the following entries and enable them by setting the value of enabled to 1: [ol6_playground_latest] name=Latest mainline stable kernel for Oracle Linux 6 ($basearch) - U nsupported baseurl=http://public-yum.oracle.com/repo/OracleLinux/OL6/playground/ latest/$basearch/ gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-oracle gpgcheck=1 enabled=0 [ol6_ofed_UEK] name=OFED supporting tool packages for Unbreakable Enterprise Kernel on Oracle Linux 6 ($basearch) baseurl=http://public-yum.oracle.com/repo/OracleLinux/OL6/ofed_UEK/$b asearch/ gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-oracle gpgcheck=1 enabled=0 Note On a freshly installed Oracle Linux 6 Update 5 system, the public-yum-ol6.repo file uses the variables uek and uekr3 to enable or disable ol6_UEK_latest and ol6_UEKR3_latest. For an i386 system, the value of uek is set to 1 in /etc/yum/vars/uek to enable ol6_UEK_latest and the value of uekr3 is set to 0 in /etc/yum/vars/uekr3 to disable ol6_UEKR3_latest. For an x86-64 system, the value of uekr3 is set to 1 in /etc/yum/vars/uekr3 to enable ol6_UEKR3_latest and the value of uek is set to 0 in /etc/yum/vars/uek to disable ol6_UEK_latest. If you subsequently register the system with ULN, the repository entries in public-yum-ol6.repo are disabled and the values of both uek and uekr3 are set to 0. 3.2.3. About Oracle Linux Installation Media Oracle Linux 6 Update 5 contains three distinct repository sources on the installation media for the Unbreakable Enterprise Kernel Release 2, the Unbreakable Enterprise Kernel Release 3, and the Red Hat Compatible Kernel. To configure yum to use both an Unbreakable Enterprise Kernel Release 2 and the Red Hat Compatible Kernel repositories from an ISO image of the installation media, create the file /etc/yum.repos.d/Media.repo containing entries similar to the following: [ol6_base_media] name=Oracle Linux 6 Update 5 Base Media baseurl=file:///media/ISOimage/Server gpgkey=file:///media/ISOimage/RPM-GPG-KEY gpgcheck=1 enabled=1 [ol6_uek_media] name=Oracle Linux 6 Update 5 UEK Media baseurl=file:///media/ISOimage/UEK2 gpgkey=file:///media/ISOimage/RPM-GPG-KEY gpgcheck=1 enabled=1 To configure yum to use both an Unbreakable Enterprise Kernel Release 3 and the Red Hat Compatible Kernel repositories from an ISO image of the installation media, create the file /etc/yum.repos.d/Media.repo containing entries similar to the following: [ol6_base_media] name=Oracle Linux 6 Update 5 Base Media baseurl=file:///media/ISOimage/Server gpgkey=file:///media/ISOimage/RPM-GPG-KEY gpgcheck=1 enabled=1 [ol6_uekr3_media] name=Oracle Linux 6 Update 5 UEK Media baseurl=file:///media/ISOimage/UEKR3 gpgkey=file:///media/ISOimage/RPM-GPG-KEY gpgcheck=1 enabled=1 Note The ol6_uekr3_media repository is not available for i386 systems. Adjust the value of the baseurl and gpgkey parameters to match the mount point of the ISO image on your system. If you do not require one of the repositories, set the value of the corresponding enabled parameter to 0. 3.3. Upgrading the Unbreakable Enterprise Kernel Oracle Linux 6 Update 5 ships with the latest Unbreakable Enterprise Kernel Release 2 for i386 and Unbreakable Enterprise Kernel Release 3 for x86-64. If you upgrade your system from the installation media, there are four upgrade scenarios: * If the UEK Release 2 or Release 3 is not currently installed on the system, only the latest Red Hat Compatible Kernel is installed. The UEK R2 or UEK R3 kernel is not installed. * If UEK R2 is currently installed on an i386 system, the latest version of the UEK R2 kernel is installed. * If UEK R2 is currently installed on an x86-64 system, the latest version of the UEK R2 kernel is installed unless you enable the UEK R3 repository. * If UEK R3 is currently installed on an x86-64 system, the latest version of the UEK R3 kernel is installed. yum uses whatever repositories you have configured on your system to upgrade it. You can find the latest UEK R2 packages in the ol6_i386_UEK_latest and ol6_x86_64_UEK_latest repositories and the latest UEK R3 packages in the ol6_UEKR3_latest repository. If you want to install the latest UEK R2 kernel on an i386 or x86-64 system, subscribe your system to the ol6_i386_UEK_latest or ol6_x86_64_UEK_latest channel on ULN, or configure the repository in the /etc/yum.repos.d/public-yum-ol6.repo file as shown here: [ol6_UEK_latest] name=Latest Unbreakable Enterprise Kernel for Oracle Linux $releaseve r ($basearch) baseurl=http://public-yum.oracle.com/repo/OracleLinux/OL6/UEK/latest/ $basearch/ gpgkey=http://public-yum.oracle.com/RPM-GPG-KEY-oracle-ol6 gpgcheck=1 enabled=1 If you want to update an x86-64 system to use the latest UEK R3 kernel, subscribe your system to the ol6_x86_64_UEKR3_latest channel on ULN, or configure the repositories in the /etc/yum.repos.d/public-yum-ol6.repo file as shown here: [ol6_UEKR3_latest] name=Latest Unbreakable Enterprise Kernel Release 3 for Oracle Linux $releasever ($basearch) baseurl=http://public-yum.oracle.com/repo/OracleLinux/OL6/UEKR3/lates t/$basearch/ gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-oracle gpgcheck=1 enabled=1 3.4. Applying the Update Once you have set up the ULN channels, Public Yum repositories, or installation media repositories that yum should use, you can update all installed packages by running the following command: # yum update This command upgrades your system to Update 5. You can use the following command to update a specific package: # yum update package For example, to update the Z-shell package (zsh), you would enter: # yum update zsh For more information, see the yum(8) manual page. Appendix A. Packages The following sections list the packages that have been added to, modified from, or removed from the upstream release, or which have been added to the base release by Oracle. A.1. Packages Added to the Upstream Release The following packages have been added to the upstream release: * freerdp * gcc-libraries * glusterfs * mesa-private-llvm * openhpi32 * p11-kit * ps_mem * redhat-support-lib-python * redhat-support-tool * snappy * xorg-x11-glamor A.2. Packages Modified from the Upstream Release The following packages have been modified from the upstream release: * abrt * anaconda * autofs * basesystem * bfa-firmware * bind * boost * brltty * btrfs-progs * compat-glibc * coreutils * cpuspeed * crash * createrepo * dbus * device-mapper-multipath * dhcp * dracut * e2fsprogs * efax * firefox * firstaidkit * firstboot * fuse * gdm * git * glusterfs * gnome-desktop * grub * grubby * gstreamer * httpd * hypervkvpd * initscripts * iptables * irqbalance * iscsi-initiator-utils * java-1.6.0-openjdk * java-1.7.0-openjdk * kabi-whitelists * kabi-yum-plugins * kdeadmin * kdebase * kdebase-workspace * kdelibs * kde-settings * kexec-tools * libitm * libreoffice * libreport * libvirt * libxml2 * libxslt * luci * mkbootdisk * module-init-tools * net-snmp * netxen-firmware * nmap * nss * openmpi * openoffice.org * openssl098e * oprofile * PackageKit * pango * pcs * pilot-link * piranha * plymouth * policycoreutils * publican * python-virtinst * ql2400-firmware * ql2500-firmware * qperf * qpid-cpp * qpid-qmf * rdma * redhat-bookmarks * redhat-indexhtml * redhat-lsb * redhat-release-server * redhat-rpm-config * rhn-client-tools * rhnlib * rhnsd * rpmdevtools * rsyslog * sanlock * selinux-policy * setroubleshoot * setroubleshoot-plugins * sos * system-config-date * system-config-date-docs * system-config-kickstart * system-config-network * system-config-services * system-config-services-docs * system-config-users-docs * system-icon-theme * systemtap * thunderbird * tog-pegasus * udev * wireshark * xfsdump (x86-64 only) * xfsprogs (x86-64 only) * xkeyboard-config * xsane * xulrunner * yum * yum-rhn-plugin * yum-utils Unless otherwise noted, changes relate to branding, trademark usage, or user-interface modifications. A.3. Packages Removed from the Upstream Release The following packages from the upstream release are not included: * iprutils * libehca * libica * libreport-plugin-rhtsupport * librtas * libservicelog * libvpd * lsvpd * openssl-ibmca * powerpc-utils * ppc64-diag * ppc64-utils * publican-redhat * python-rhsmm * Red_Hat_Enterprise_Linux-Release_Notes-6-as-IN * Red_Hat_Enterprise_Linux-Release_Notes-6-bn-IN * Red_Hat_Enterprise_Linux-Release_Notes-6-de-DE * Red_Hat_Enterprise_Linux-Release_Notes-6-en-US * Red_Hat_Enterprise_Linux-Release_Notes-6-es-ES * Red_Hat_Enterprise_Linux-Release_Notes-6-fr-FR * Red_Hat_Enterprise_Linux-Release_Notes-6-gu-IN * Red_Hat_Enterprise_Linux-Release_Notes-6-hi-IN * Red_Hat_Enterprise_Linux-Release_Notes-6-it-IT * Red_Hat_Enterprise_Linux-Release_Notes-6-ja-JP * Red_Hat_Enterprise_Linux-Release_Notes-6-kn-IN * Red_Hat_Enterprise_Linux-Release_Notes-6-ko-KR * Red_Hat_Enterprise_Linux-Release_Notes-6-ml-IN * Red_Hat_Enterprise_Linux-Release_Notes-6-mr-IN * Red_Hat_Enterprise_Linux-Release_Notes-6-or-IN * Red_Hat_Enterprise_Linux-Release_Notes-6-pa-IN * Red_Hat_Enterprise_Linux-Release_Notes-6-pt-BR * Red_Hat_Enterprise_Linux-Release_Notes-6-ru-RU * Red_Hat_Enterprise_Linux-Release_Notes-6-si-LK * Red_Hat_Enterprise_Linux-Release_Notes-6-ta-IN * Red_Hat_Enterprise_Linux-Release_Notes-6-te-IN * Red_Hat_Enterprise_Linux-Release_Notes-6-zh-CN * Red_Hat_Enterprise_Linux-Release_Notes-6-zh-TW * redhat-logos * redhat-release-notes-6Server * redhat-support-lib-python * redhat-support-tool * s390utils * servicelog * subscription-manager * subscription-manager-migration-data * virt-who * yaboot A.4. Packages Added by Oracle The following packages have been added to the base release by Oracle: * dtrace-modules-3.8.13-16.el6uek (x86-64 only) * kernel-uek (2.6.39 for i386 and 3.8.13 for x86-64) * libdtrace-ctf (x86-64 only) * lxc (x86-64 only) * ocfs2-tools * oracleasm-support * oracle-logos * oraclelinux-release * oraclelinux-release-notes * oracle-rdbms-server-11gR2-preinstall * reflink * uname26 (x86-64 only) Copyright (c) 2013, 2014, Oracle and/or its affiliates. All rights reserved. Legal Notices