Oracle(r) Linux
Release Notes for Release 6.4
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E39522-06
July 2013
Abstract
This document contains information on Oracle Linux Release 6
Update 4. 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: 2013-07-10 (revision: 1091)
_______________________________________________________
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 4.
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 4 " 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
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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.
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Chapter 1. New Features and Changes
This chapter describes the new features that are introduced by
Oracle Linux 6 Update 4.
1.1. Supported Kernels
Oracle Linux 6 Update 4 ships with two sets of kernel packages:
* Unbreakable Enterprise Kernel Release 2
(kernel-uek-2.6.39-400.17.1.el6uek)
* Red Hat Compatible Kernel (kernel-2.6.32-358.el6)
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.
To make your system use 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.
1.1.1. 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, the following device drivers have been updated by
Oracle in the 2.6.39-400 kernel.
Storage Adapter Drivers
Broadcom
* NetXtreme II iSCSI driver (bnx2i) updated to 2.7.4.1f.
* NetXtreme II Fibre Channel over Ethernet driver (bnx2fc)
updated to 2.2.17.
Emulex
* Blade Engine 2 Open-iSCSI driver (be2iscsi) updated to
10.0.272.0o.
* Fibre Channel HBA driver (lpfc) updated to 8.3.5.86.2p.
Mellanox
* ConnectX core driver (mlx4_core) released at 1.0-ofed1.5.5
(x86_64 only). Handles low-level functions such as device
initialization and firmware commands processing, and controls
resource allocation so that the InfiniBand and Ethernet
functions can share a device without interfering with each
other.
* ConnectX Ethernet driver (mlx4_en) released at 1.5.4.24
(x86_64 only). Handles Ethernet-specific functions and plugs
into the netdev mid-layer.
* ConnectX InfiniBand driver (mlx4_ib) released at 1.0-ofed1.5.5
(x86_64 only). Handles InfiniBand-specific functions.
QLogic
* Fibre Channel HBA driver (qla2xxx) updated to
8.04.00.11.39.0-k.
* iSCSI driver (qla4xxx) updated to 5.03.00.01.06.02-uek2. Now
supports Open-iSCSI.
Network Adapter Drivers
Broadcom
* NetXtreme II network adapter driver (bnx2) updated to 2.2.3e.
* NetXtreme II 10Gbps network adapter driver (bnx2x) updated to
1.74.17.
* Converged Network Interface Card core driver (cnic) updated to
2.5.12e.
* Tigon3 Ethernet adapter driver (tg3) updated to 3.125g.
Emulex
* Blade Engine 2 10Gbps adapter driver (be2net) updated to
4.4.161.0o.
Intel
* PRO/1000 PCI-Express Gigabit network adapter driver (e1000e)
updated to 2.1.4-NAPI.
* Gigabit Ethernet network adapter driver (igb) updated to
4.0.17.
* 10 Gigabit PCI-Express network adapter driver (ixgbe) updated
to 3.11.33.
* 10 Gigabit Server Adapter virtual function driver (ixgbevf)
updated to 2.6.2-NAPI. The kernel must support Single Root I/O
Virtualization (SR-IOV).
QLogic
* NetXen Multiport 1/10 Gigabit Network adapter driver
(netxen_nic) updated to 4.0.80.
* 1/10 GbE Converged/Intelligent Ethernet Adapter driver
(qlcnic) updated to 5.1.27.35.
* QLE81xx network adapter driver (qlge) updated to v1.00.00.31.
Miscellaneous Drivers
Oracle
* Reliable Datagram Sockets driver (rds) updated to 4.1. RDS
provides in-order, non-duplicated, highly-available,
low-overhead, reliable delivery of datagrams between hundreds
of thousands of non-connected endpoints.
1.2. Notable New Features
This release of the Unbreakable Enterprise Kernel includes the
following new functionality:
* The following InfiniBand hardware is supported with the
Unbreakable Enterprise Kernel:
+ Mellanox ConnectX-2 InfiniBand Host Channel Adapters
+ Sun InfiniBand QDR Host Channel Adapter PCIe #375-3696
* InfiniBand support via the rdma package. To start the rdma
service, and enable it to load all the required modules
automatically when you reboot the system, run the following
commands as root:
# service rdma start
# chkconfig --level 2345 rdma on
To stop or restart the rdma service, use the following
commands:
# service rdma stop
# service rdma restart
To configure which upper-layer modules the rdma service should
load, edit /etc/rdma/rdma.conf.
* The Linux Containers template script for Oracle Linux
(lxc-oracle) supports the creation of containers for Oracle
Enterprise Linux 4, Oracle Linux 5, and Oracle Linux 6,
downloading and installing the release RPMs from the Public
Yum repository.
1.2.1. Xen Improvements
Several improvements have been incorporated to support Xen usage
with the Unbreakable Enterprise Kernel:
* Numerous bug fixes and performance improvements.
* Added support for more than 128 GB in a PV guest.
* Xen Machine Check Exception (MCE) driver added (allows you to
view MCE events that the Xen hypervisor receives).
* Xen Physical CPU (PCPU) driver added (allows management tools
to online or offline physical CPUs in dom0).
* Xen Processor Aggregator Device (PAD) added (enables
configuration and control of all processors on a platform).
1.2.2. Notable New Features Available with the Red Hat Compatible
Kernel
The following sections detail notable new features in this update
for the Red Hat Compatible Kernel.
1.2.2.1. LVM RAID10 Support
You can create, resize, and remove RAID10 volumes in LVM, where
striping is laid out across an array of mirrors.
To create a RAID 10 logical volume, use the following form of the
lvcreate command:
# lvcreate --type raid10 -m mirrors -i stripes -L lv_size -n lv_name
vol_grp
For example, the following command would create a 200 GB RAID10
volume named myr10vol with four stripes and two mirrors in the
myvg volume group:
# lvcreate --type raid10 -m 1 -i 4 -L 200G -n myr10vol myvg
The -m option specifies the number of additional copies of the
data, not the total number of copies.
1.2.2.2. New Boot and Kickstart Options
The following new boot options are available:
bond=bondname:bondslave1[,bondslave2]...:[opt1[, opt2]...]
Specifies the bonded network interface, the network connections to
be bonded to the interface, and any additional options.
vlanid=tag
Specifies a network device's numeric 802.1q tag to allow
installation over a VLAN.
The following new Kickstart options are available with the network
keyword:
--bondslaves=bondslave1[,bondslave2]... --bondopts=opt1[, opt2]...
Specifies the network connections to be bonded to the network
interface, and any additional options.
--vlanid=tag
Specifies a network device's numeric 802.1q tag to allow
installation over a VLAN.
The new Kickstart fcoe keyword allows you to enable Fibre Channel
over Ethernet (FCoE) devices in addition to Enhanced Disk Drive
Services (EDD) discovered devices. The following options are
available with the fcoe keyword:
--autovlan
Specifies that VLANs should be discovered automatically.
--dcb=setting1[,setting2]...
Specifies settings for Data Center Bridging (DCB).
--nic=device
Specifies the name of the FCoE device to activate.
1.2.2.3. Persistent Device Naming
udev maintains persistent device names for devices such as
/dev/sdb by creating symbolic links such as
/dev/disk/by-path/pci-0000:00:0d.0-scsi-1:0:0:0 and
/dev/disk/by-uuid/e8d40553-43f2-4ae6-8e4b-38e04e7ee41c. The kernel
message log now records each udev persistent device name mapping
in the following format:
udev-alias: device_name (udev_persistent_name1 udev_persistent_name2
... )
1.2.2.4. PMU Support for Uncore and Load Latency
The uncore feature of the perf event subsystem implements
Performance Monitoring Unit (PMU) support for the Intel Xeon
Processor X55xx and X56xx processor families. Multiple processor
cores can share physical uncore subsystems, including the L3
cache. Uncore PMU support allows packages to collect performance
data, including load latency at various levels in the cache and
memory hierarchy, which ranges from micro-operation dispatch up to
globally observable data. Debugging in perf is made possible by
the implementation of PMU event parsing.
1.3. Technology Preview Features
The following features included in the Unbreakable Enterprise
Kernel Release 2 are still under development, but are made
available for testing and evaluation purposes.
* 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.
* Linux Containers (lxc)
Based on the Linux Cgroups and name spaces functionality,
containers 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.
* Transcendent memory (tmem)
Transcendent Memory 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/
* Distributed Replicated Block Device (DRBD)
A 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.
The following Technology Preview features are currently not
supported under Oracle Linux 6 and may 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 only available when
running the Red Hat Compatible Kernel (RHCK):
* Brocade BFA driver
* Diagnostic pulse for the fence_ipmilan agent
* Error Detection And Correction (EDAC) driver interface
* Fibre Channel over Ethernet (FCoE) target mode
* Kernel Media support
* KVM Live Snapshots
* KVM network drivers wire-speed requirement
* Parallel NFS
* Remote audit logging
* Single Root I/O Virtualization (SR-IOV) on the be2net driver
* System monitoring via SNMP
These features are not suitable for production use, but are
included to give them wider exposure.
1.4. Packages Added to the Upstream Release
The following packages have been added to the upstream release:
* cgdcbxd
* cpupowerutils
* haproxy
* hypervkvpd
* keepalived
* libitm
* libjpeg-turbo
* libldb
* linuxptp
* mesa-dri1-drivers
* mtdev
* pcs
* python-linux-procfs
* python-schedutils
* scipy
* suitesparse
* tbb
* tuna
* xorg-x11-drv-modesetting
1.5. Packages Modified from the Upstream Release
The following packages have been modified from the upstream
release:
* abrt
* anaconda
* autofs
* basesystem
* bind
* brltty
* btrfs-progs
* boost
* compat-glibc
* coreutils
* crash
* cpuspeed
* dbus
* device-mapper-multipath
* dhcp
* dracut
* efax
* firefox
* firstaidkit
* firstboot
* gdm
* git
* gnome-desktop
* grub
* grubby
* gstreamer
* httpd
* hypervkvpd
* initscripts
* irqbalance
* iscsi-initiator-utils
* java-1.7.0-openjdk
* kabi-whitelists
* kabi-yum-plugins
* kdeadmin
* kdebase
* kdelibs
* kde-settings
* kdebase-workspace
* kexec-tools
* libxml2
* libxslt
* libitm
* libreoffice
* libreport
* libvirt
* luci
* mkbootdisk
* module-init-tools
* net-snmp
* netxen-firmware
* nmap
* nss
* ocaml-libvirt
* openmpi
* openoffice.org
* openssl098e
* PackageKit
* pcs
* pilot-link
* piranha
* plymouth
* policycoreutils
* publican
* python-virtinst
* qpid-cpp
* qpid-qmf
* rdma
* redhat-bookmarks
* redhat-indexhtml
* redhat-lsb
* redhat-release-server
* redhat-rpm-config
* rhn-client-tools
* rhnlib
* rhnsd
* rpmdevtools
* 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
* xsane
* xulrunner
* yum
* yum-rhn-plugin
* yum-utils
Unless otherwise noted, changes relate to distro renaming,
trademark usage, or user-interface modifications.
1.6. 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-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
* s390utils
* servicelog
* subscription-manager
* subscription-manager-migration-data
* virt-who
* yaboot
1.7. Packages Added by Oracle
The following packages have been added to the base release by
Oracle:
* kernel-uek
* lxc (x86_64 only)
* ocfs2-tools
* oracleasm-support
* oracle-logos
* oraclelinux-release
* oraclelinux-release-notes
* oracle-rdbms-server-11gR2-preinstall
* reflink
Chapter 2. Fixed and Known Issues
This chapter describes the fixed and known issues for Oracle Linux
6 Update 4.
Important
Run the yum update command regularly to ensure that the latest bug
fixes and security errata are installed on your system.
2.1. Fixed Issues
The following issues have been fixed in this update:
* The updated automounter package (autofs) allows NetApp filer
paths to be automounted. (Bug ID 12658280)
* The legacy DNS resolver in the UEK R2 kernel now supports the
sending of NFSv4 referrals (lists of NFS servers and exported
NFS file systems) to Oracle Linux 6 clients. The user-space
component is included with the nfs-utils package. (Bug ID
14769650)
2.2. Known Issues
This section describes known issues in this update.
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)
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)
Linux Containers 32-bit Support
The Linux Containers package (lxc) is not available for the i386
architecture.
Linux Containers Interoperability with SELinux
Running with SELinux enabled on the host can cause issues with
Linux Containers. The workaround is to disable SELinux altogether
by setting SELINUX=disabled in /etc/selinux/config and rebooting
the system. Using the setenforce Permissive command is not
sufficient as the selinuxfs pseudo file system remains mounted.
(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.
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)
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 Balancing
Running btrfs filesystem balance converts a non-RAID or
concatenated file system setup to RAID-0 after adding a new
device. Do not run this command if you do not intend to convert
the profile of the file system after adding the new device. (Bug
ID 13715389)
Btrfs Conversion Does Not Preserve SELinux Security Contexts
Converting an existing ext2, ext3, or ext4 root file system to
btrfs does not carry over the associated security contexts that
are stored as part of a file's extended attributes. With SELinux
enabled and set to enforcing mode, you might experience many
permission denied errors after reboot, and the system might be
unbootable. To avoid this problem, enforce automatic file system
relabeling run at bootup time. To trigger automatic relabeling,
create an empty file named autorelabel (for example, by using
touch) in the file system's root directory before rebooting the
system after the initial conversion. The presence of this file
instruct SELinux to recreate the security attributes for all files
on the file system. If you forget to do this and rebooting fails,
either temporarily disable SELinux completely by adding selinux=0
to the kernel boot parameters, or disable enforcing of the SELinux
policy by adding enforcing=0. (Bug ID 13806043)
Btrfs RAID1 Failure Results in a Kernel Panic
A failing RAID1 disk might result in a kernel panic with the error
kernel: BTRFS error (device (null)) in
btree_writepage_io_failed_hook:3662: IO failure (Error occurred
while writing out btree at offset). (Bug ID 16262571)
btrfs subvolume get-default Command
The btrfs subvolume get-default command lists all existing
subvolumes instead of only the default subvolume. (Bug ID
13815433)
btrfs filesystem defragment Command
The btrfs filesystem defragment command exits with an exit code of
20 even if it succeeds. (Bug ID 13714531)
Btrfs File Size
Commands such as du might show inconsistent results for file sizes
in a btrfs file system when the number of bytes that is under
delayed allocation is changing. (Bug ID 13096268)
Btrfs Hard Link Limit
Btrfs has a limit of 237 hard links to a file. Attempting to
create more than this number of links results in the error Too
many links. (Bug ID 16278563)
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.
Mellanox ConnectX Drivers
The Mellanox ConnectX core, Ethernet, and InfiniBand drivers are
supported only for the x86_64 architecture.
(Bug ID 16228063)
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
and then run uln_register again. (Bug ID 14696776)
xguest Package Not Installable with SELinux Disabled
If the xguest package fails to install with a PREIN script error,
enable SELinux by setting SELINUX=enabled in /etc/selinux/config,
reboot the system, and reinstall the xguest package. (Bug ID
13495388)
X Window System Does Not Run in a PVHVM guest
If you install an Oracle Linux 6 Update 4 (x86_64) PVHVM guest
with either the Desktop or the Software Development Workstation
installation options, the X Window System is not accessible after
installation when you boot the guest into run level 5. This
problem is seen in OVM 3.0 and later.
Use the following workaround:
1. Boot the guest into run level 3 by appending 3 to the kernel
command line in GRUB, for example:
kernel /vmlinuz-2.6.39-400.15.0.el6uek.x86_64 ... rd_NO_DM 3
2. After the guest boots, log in as root, and uninstall the
xorg-x11-drv-cirrus package, for example:
# rpm -ev --nodeps xorg-x11-drv-cirrus
You can then either reboot the system into run level 5 or use the
init 5 command to switch to run level 5. The X Window System will
be accessible on subsequent boots to run level 5. (Bug ID
16280196)
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)
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)
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
These errors can safely be ignored.
FCoE Target Service
The upstream release has added support for FCoE target service.
This service is not supported with the previous release of the
Unbreakable Enterprise Kernel (2.6.32). To use this service, boot
your system into the Unbreakable Enterprise Kernel Release 2
(2.6.39) or the Red Hat Compatible Kernel.
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.
Kdump Service Fails to Start for UEK
When configuring the crash kernel for the UEK, only standard crash
kernel settings (for example, crashkernel=128M@32M) are supported.
The new settings used by the Red Hat Compatible Kernel (for
example, crashkernel=auto) are not supported and cause the kdump
service to fail to start. (Bug ID 13495212)
iTCO_wdt Errors
If you see the boot-time dmesg error iTCO_wdt: failed to reset
NO_REBOOT flag, device disabled by hardware/BIOS with UEK R2 or
iTCO_wdt: failed to reset NO_REBOOT flag, reboot disabled by
hardware with UEK, add the line blacklist iTCO_wdt to
/etc/modprobe.d/blacklist-watchdog.
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).
Incorrect Package Count
Selecting all packages in certain groups during installation might
not show the correct package count. (Bug ID 11684244)
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)
Receive Packet Steering errors
Certain network operations that utilize receive packet steering
could cause errors on the system. (Bug ID 11071685)
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)
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
Setting the Serial Console in a Hardware Virtualized Guest
To set the serial console 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
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)
Unbreakable Linux Network
Following the first reboot after installing Oracle Linux 6, you
are prompted to register your system with the Unbreakable Linux
Network (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.
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.
sched_yield() Settings for 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.
Chapter 3. Upgrading to Oracle Linux 6 Update 4
This chapter describes how to upgrade your system to Oracle Linux
6 Update 4.
3.1. Supported Upgrade Paths
Upgrading from Oracle Linux 6 GA, Update 1, Update 2, or Update 3
is supported. 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 Unbreakable Enterprise Kernel without upgrading to Oracle Linux
6 as Oracle Linux 5.8 includes the Unbreakable Enterprise Kernel.
3.2. Obtaining Oracle Linux 6 Update 4 Packages
Note
You use yum rather than up2date to manage packages with Oracle
Linux 6. Using up2date is not supported.
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 and the
Unbreakable Enterprise Kernel Release 2. If you have upgraded your
system from a previous release and do not want to install UEK
Release 2, you must manually unsubscribe the server from this
channel.
ULN also provides channels for Oracle-specific software packages
such as Oracle's ASMlib userspace 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 4 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=http://public-yum.oracle.com/RPM-GPG-KEY-oracle-ol6
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=http://public-yum.oracle.com/RPM-GPG-KEY-oracle-ol6
gpgcheck=1
enabled=1
3.2.3. About Oracle Linux Installation Media
Oracle Linux 6 Update 4 contains two distinct repository sources
on the installation media for the Red Hat Compatible Kernel and
the Unbreakable Enterprise Kernel. To configure yum to use both
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 4 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 4 UEK Media
baseurl=file:///media/ISOimage/UEK2
gpgkey=file:///media/ISOimage/RPM-GPG-KEY
gpgcheck=1
enabled=1
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. Applying Updates
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
If your system is currently installed with Oracle Linux 6 GA,
Update 1, Update 2, or Update 3, this command upgrades it to
Update 4.
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.
3.4. Upgrading Unbreakable Enterprise Kernel Release 2
Oracle Linux 6 Update 4 ships with the latest Unbreakable
Enterprise Kernel Release 2. If you upgrade your system from the
installation media, there are two upgrade scenarios:
* If UEK R2 is not currently installed on the system, only the
latest Red Hat Compatible Kernel is installed. The UEK R2
kernel is not installed.
* If UEK R2 is currently installed on the system, the latest
version of that kernel is installed.
yum uses whatever repositories you have configured on your system
to upgrade it. You can find the latest UEK2 packages in the
ol6_i386_UEK_latest and ol6_x86_64_UEK_latest repositories. If you
want to install the latest UEK R2 kernel, subscribe your system to
the correct 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
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