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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)
Table of Contents
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.
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.
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.
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.
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.
The latest version of this document and other documentation for this product are available at:
http://www.oracle.com/technetwork/server-storage/linux/documentation/index.html.
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. |
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Table of Contents
This chapter describes the new features that are introduced by Oracle Linux 6 Update 5.
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:
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.)
Edit /etc/sysconfig/kernel and change the setting for the default
kernel package type from DEFAULTKERNEL=kernel-uek to
DEFAULTKERNEL=kernel.
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:
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.
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.
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).
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.
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.
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.
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
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/
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/
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
Btrfs and FUSE are supported features in the UEK R2 and UEK R3 distributions.
LXC is a supported feature in the UEK R3 distribution.
Table of Contents
This chapter describes the fixed and known issues for Oracle Linux 6 Update 5.
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.
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.
The following major issues are fixed in this update:
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.
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)
This section describes known issues in this update.
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)
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)
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.
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.
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)
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.
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
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)
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 function declaration
The vtimestamp() function does not return a correct value. (Bug
ID 17741477)
To make an Oracle Linux Release 6 Update 5 system compliant with Federal Information Processing Standard (FIPS) Publication 140-2, perform the following steps:
Install the dracut-fips package:
# yum install dracut-fipsRecreate the initramfs file system:
# dracut -fIdentify 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.
Add either a boot= entry or a
deviceboot=UUID= entry for the boot
device to the uuidkernel command line in
/etc/grub.conf.
Add a fips=1 entry to the kernel command line
in /etc/grub.conf to specify strict FIPS compliance.
Disable prelinking by setting PRELINKING=no in
/etc/sysconfig/prelink.
Remove all existing prelinking from binaries and libraries:
# prelink -uaInstall the openssh-server-fips and
openssh-client-fips packages and their dependent packages:
# yum install openssh-server-fips openssh-client-fipsShut down and reboot the system.
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)
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 43003c)
You can safely ignore this message. The functionality and performance of the operating system and the server are not affected.
Selecting all packages in certain groups during installation might not show the correct package count. (Bug ID 11684244)
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.
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)
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)
The Linux Containers package (lxc) is not available for the i386
architecture.
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:
Edit the configuration file for SELinux, /etc/selinux/config and
set the value of the SELINUX directive to
disabled.
Shut down and reboot the host system.
(Bug ID 15967411)
The default location for a container's configuration has changed from
/etc/lxc/ to
name/container/ in namelxc
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:
Move the container's configuration directory to
/container/:name
# mv /etc/lxc/name /container Edit the /container/ file
and change the values of any name/configlxc.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,bind 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 ro,bind 0 0
After converting the container, you do not need to specify the -f option to lxc-start. (Bug ID 15967411)
The Mellanox ConnectX core, Ethernet, and InfiniBand drivers are supported only for the x86-64 architecture. (Bug ID 16228063)
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.
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 from 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)
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)
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)
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/LogVol00 xen_emul_unplug=never
Adding this parameter makes the kernel also present the emulated drivers as previously
(for example, the 8139cp network driver).
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 keysymsThese errors can safely be ignored.
Certain network operations that utilize receive packet steering could cause errors on the system. (Bug ID 11071685)
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.
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
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)
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)
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/oom_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)
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)
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.
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)
Table of Contents
This chapter describes how to upgrade your system to Oracle Linux 6 Update 5.
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.
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.
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.
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/$basearch/ 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 $releasever ($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/$basearch/ 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/latest/$basearch/ gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-oracle gpgcheck=1 enabled=1
The ol6_UEKR3_latest repository is not available for i386
systems.
If you want to install packages from the playground or OFED repositories, add the
following entries and enable them by setting the value of enabled to
1:
[ol6_playground_latest] name=Latest mainline stable kernel for Oracle Linux 6 ($basearch) - Unsupported 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/$basearch/ gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-oracle gpgcheck=1 enabled=0
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.
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
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.
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 $releasever ($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/latest/$basearch/ gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-oracle gpgcheck=1 enabled=1
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 updateThis command upgrades your system to Update 5.
You can use the following command to update a specific package:
# yum update packageFor example, to update the Z-shell package (zsh), you would
enter:
# yum update zshFor more information, see the yum(8) manual page.
Table of Contents
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.
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
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.
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
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)
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