5.8 Release Notes
Release Notes for Red Hat Enterprise Linux 5.8
Chapter 1. Installation
Red Hat Enterprise Linux 5.8 supports installation over the IP over Infiniband (IPoIB) interface.
Chapter 2. Kernel
2.1. Kernel Platform Enhancements
Support for the Power Management Quality Of Service (
pm_qos) infrastructure has been added in Red Hat Enterprise Linux 5.8. The
pm_qos interface provides a kernel and user mode interface for registering performance expectations by drivers, subsystems and user space applications for one of the currently supported
network_throughput. For more information, refer to
Red Hat Enterprise Linux 5.8 provides PCIe 3.0 full function support by adding ID-based ordering, OBFF (Optimized Buffer Flush/Fill) enable/disable support, and latency tolerance reporting enable/disable support.
Support for ALSA HD Audio on Intel's next Platform Controller Hub has been added.
Device IDs have been added to provide full support of Intel's next Platform Controller Hub for the following drivers: SATA, SMBus, USB, Audio, Watchdog, I2C.
Support for the StarTech 1 Port PCI Express Parallel Port device has been added.
Support for the
configure-pe RTAS (RunTime Abstraction Services) call on the PowerPC platform has been added.
The JSM driver has been updated to support the Bell2 (with PLX chip) 2-port adapter on IBM POWER7 systems. Additionally, EEH support has been added to the JSM driver.
2.2. Kernel Generic Features
In Red Hat Enterprise Linux 5.8, the
/proc/sysvipc/shm file (which provides a list of shared memory in use) now contains the RSS (Resident Set Size—portion of the process residing in the memory) and swap size information.
Support for the OProfile profiler on Intel's Sandy Bridge platform has been added by supporting all core events (except Precise Event-Based Sampling).
Red Hat Enterprise Linux 5.8 adds support for the Wacom Bamboo MTE-450A tablet.
Support for the X-keys Jog and Shuttle Pro device has been added to Red Hat Enterprise Linux 5.8.
The bonding module in the kernel now reports the current link-speed for any network interface controller. Previously, the bonding module only reported speeds of 10/100/1000/10000. This change provides accurate reporting of the link-speed in blade enclosure environments that may use non-standard speeds such as 9 Gbs.
CONFIG_SERIAL_8250_NR_UARTS parameter defines the maximum number of serial interfaces supported by the kernel. In Red Hat Enterprise Linux 5.8, the value of
CONFIG_SERIAL_8250_NR_UARTS parameter has been increased to
64 for systems which have more than 32 (and up to 64) console connections.
blacklist option is now available for Kdump configuration. This option prevents modules from being loaded in
initramfs. For more information, refer to the kdump.conf(5) manual page.
iscsisupport in Kdump
Support for the
iscsi drivers has been added to Kdump's initial RAM disk (
Kdump on Xen HVM guests is now enabled in Red Hat Enterprise Linux 5.8 as a Technology Preview. Performing a local dump to an emulated (IDE) disk using an Intel 64 Hypervisor with an Intel CPU is the only supported implementation. Note that the dump target must be specified in the
Chapter 3. Device Drivers
3.1. Storage Drivers
iprdriver for IBM Power Linux RAID SCSI HBAs has been updated to enable SAS VRAID functions and add definitions for new adapters.
megaraiddriver has been updated to version 5.40, which provides a fix for FastPath I/O to work with degraded RAID 1.
- Panther Point PCH driver has been updated to add the AHCI (Advanced Host Controller Interface) mode for Intel Panther Point Device IDs.
qla2xxx4G and 8G driver firmware was updated to version 5.06.01.
qla2xxxdriver for QLogic Fibre Channel HBAs has been updated to version 8.03.07.09.05.08-k, which provides support for ISP82xx to capture a dump (a minidump) on when failure occurs.
qla4xxxdriver has been updated to version 5.02.04.00.05.08-d0.
lpfcdriver for Emulex Fibre Channel Host Bus Adapters has been updated to version 126.96.36.199.1p.
ccissdriver has been updated to the latest version, which adds a command line switch to provide support for CCISS simple mode.
be2iscsidriver for ServerEngines BladeEngine 2 Open iSCSI devices has been updated to support the
pci_disabledevice option and a shutdown routine.
bnx2idriver for Broadcom NetXtreme II iSCSI has been updated to version 188.8.131.52.
- The kernel multipath driver has been updated to add detailed SCSI I/O errors.
bfafirmware was updated to version 184.108.40.206.
bfadriver was updated to include the following enhancements:
- Support for configuration of flash partitions.
- Support for collecting and resetting fcport statistics.
- Support for I/O profiling.
- Updated RME interrupt handling.
- Support for FC-transport asynchronous event notification.
- Support for PHYsical Layer Control (PHY) querying.
- Support for Host Bus Adapters (HBA) diagnostics.
- Support for obtaining Small Form Factor (SFP) information.
- Support for CEE information and statistics querying.
- Support for Fabric Assigned Address (FAA).
- Support for collecting driver/fw statistics and performing adapter/ioc enable/disable operations.
mpt2sasdriver was updated to version 09.100.00.00, which adds support for customer specific branding.
mptsasdriver was updated to version 3.04.20rh.
iscidriver has been updated to add type safety to the state machine interface and support for Intel's next chipset.
uIPdriver has been updated to version 0.7.0.12 as a part of the updated iscsi-initiator-utils package.
megaraid_sasdriver has been updated to version 5.40-rh1.
3.2. Network Drivers
bnx2xdriver firmware has been updated to version 7.0.23, which provides support for new Broadcom 578xx chips.
bnx2xdriver has been updated to version 1.70.x.
bnx2idriver has been updated to version 220.127.116.11+.
bnx2driver has been updated to version 2.1.11.
cnicdriver has been updated to version 2.5.3+.
cxgb3driver for the Chelsio T3 family of network devices has been updated to the latest upstream version.
cxgb4driver for Chelsio Terminator4 10G Unified Wire Network Controllers has been updated to the latest upstream version.
iw_cxgb4driver has been updated to the latest upstream version.
netxen_nicdriver has been updated to version 4.0.77, which adds support for VLAN RX HW acceleration.
tg3driver for Broadcom Tigon3 Ethernet devices has been updated to version 3.119.
ixgbedriver for Intel 10 Gigabit PCI Express network devices has been updated to upstream version 3.4.8-k.
ixgbevfdriver has been updated to upstream version 2.1.0-k.
igbvfdriver has been updated to the latest upstream version.
igbdriver for Intel Gigabit Ethernet Adapters has been updated to the latest upstream version, which adds entropy support.
e1000edriver for Intel 82563/6/7, 82571/2/3/4/7/8/9, and 82583 PCI-E family of controllers has been updated to version 1.4.4.
e1000driver for Intel PRO/1000 PCI and PCI-X family of adapters has been updated to the latest upstream version.
bnadriver has been updated to version 18.104.22.168, which provides support for the Brocade 1860 AnyIO Fabric Adapter.
qlgedriver has been updated to version 1.00.00.29.
qlcnicdriver for HP NC-Series QLogic 10 Gigabit Server Adapters has been updated to version 5.0.18.
be2netdriver for ServerEngines BladeEngine2 10Gbps network devices has been updated to the latest upstream version.
enicdriver for Cisco 10G Ethernet devices has been updated to version 22.214.171.124.
nbddriver has been updated to add a user-settable timeout (
NBD_SET_TIMEOUT) for I/O operations.
3.3. Graphics drivers
i810graphics driver (provided by the xorg-x11-drv-i810 package) has been updated to fix various bugs for the family of 32nm processors with Intel Integrated Graphics (codenamed IronLake).
- The Matrox
mgavideo card driver has been updated to provide full resolution support for ServerEngines Pilot 3 (Kronos 3) chips.
Chapter 4. File System and Storage Management
--nosyncoption for CLVM mirrored volume extension
Clustered LVM includes a new
--nosync option for extending mirrored logical volumes. When the
--nosync option is specified, extending a clustered mirrored logical volume does not cause the volume to get synchronized after the extension, potentially skipping resource intensive synchronization of empty data.
After executing the
lvextend command with the
--resizefs option, the ext4 file system automatically re-sizes itself. Performing a manual re-size with the
resize2fs is no longer required.
With Red Hat Enterprise Linux 5.8, NFS clients are allowed to use insecure ports (that is, 1024 and above).
LVM no longer scans multipath member devices (underlying paths for active multipath devices) and prefers top level devices. This behavior can be switched off using the
multipath_component_detection option in the
Chapter 5. Authentication and Interoperability
DNS SRV record support has been added to the nss_ldap package.
SSSD is now able to perform a paged LDAP look-up to handle large number of records returned by a single request.
In Red Hat Enterprise Linux 5.8, SSSD supports the following new configuration options in the
Chapter 6. Entitlement
When registering a system with firstboot, the RHN Classic option is checked by default in the Subscription part.
It is now possible to automatically regenerate new entitlement certificates after the renewal of a subscription. Prior to this enhancement, customers were required to manually regenerate the certificate to continue to receive software updates and other subscription services. Automatically regenerating a certificate minimizes service interruptions. Users are also notified of cases where auto regeneration of certificates was not successful. For more information, refer to https://www.redhat.com/rhel/renew/faqs/.
Red Hat Enterprise Linux 5.8 adds support for subscription stacking. This allows users to combine a set of subscriptions on a single machine in order to become compliant. For more information on subscription stacking, refer to the Red Hat Enterprise Linux 5 Deployment Guide.
Red Hat Enterprise Linux 5.8 includes a new tool to migrate RHN Classic customers to the certificate-based RHN. For more information, refer to the Red Hat Enterprise Linux 5 Deployment Guide.
Chapter 7. Security, Standards and Certification
OpenSCAP has been upgraded to provide SCAP 1.1 (Security Content Automation Protocol) functionality.
With Red Hat Enterprise Linux 5.8, the openssl package includes the DigiCert certificate in the
/etc/pki/tls/certs/ca-bundle.crt file (which contains trusted root CA certificates).
Chapter 8. Compiler and Tools
SystemTap is a tracing and probing tool that allows users to study and monitor the activities of the operating system (particularly, the kernel) in fine detail. It provides information similar to the output of tools like netstat, ps, top, and iostat; however, SystemTap is designed to provide more filtering and analysis options for collected information.
- Kernel modules with a hyphen ("
-") in their name, such as
i2c-coreare now handled properly.
$$parmsfor reading probe parameters.
- Improved and simplified operation of the SystemTap compile-server and client:
- compile-server may cache script build results for improved performance.
- compile-server and client communicate to exchange version information to adjust the communication protocol accordingly and use the newest version of the server possible.
- Removal of deprecated tools: stap-client, stap-authorize-server-cert, stap-authorize-signing-cert, stap-find-or-start-server, and stap-find-servers.
- For remote execution, the
--remote USER@HOSTfunctionality can now be specified multiple times and will automatically build the script for distinct kernel and architecture configurations, and run it on all named machines at once.
- The staprun utility now allows multiple instances of the same script to be run at same time.
- A new
tz_ctime()function prints the local time zone time.
jiffies()functions have been added for lightweight approximate time keeping.
Chapter 9. Clustering and High Availability
On a Red Hat Enterprise Linux 5.8 system, installing the cluster and cluster-storage packages from cdn.redhat.com resulted in the associated products, High Availability and Resilient Storage, becoming marked as not having been installed. Red Hat recommends using the Red Hat Enterprise Linux 5.8 installation media, by providing the subscription number during installation, to install packages from cluster and cluster-storage. For more information about subscription numbers, which are also known as installation numbers, refer to the following KBase article.
Chapter 10. Virtualization
Support for attaching a host CD-ROM to a paravirtualized guest as a virtual block device has been improved.
In Red Hat Enterprise Linux 5.8, virtual block devices in Xen guests reflect any on-line re-sizing of the host-side backing devices.
To enable simple installation and updating of drivers without requiring an MSI installer to be run, SPICE QXL drivers have been added to the virtio-win RPM package.
Red Hat Enterprise Linux 5.8 includes a new pixman package which provides a low-level pixel manipulation library and offers features such as image compositing and trapezoid rasterization. The pixman package is added as a dependency of the spice-client package.
Chapter 11. General Updates
Red Hat Enterprise Linux 5.8 include improved support for PDF/A—the ISO-standardized version of the Portable Document Format—by upgrading to GhostScript version 9.01.
httpd service includes a new
connectiontimout parameter which specifies the amount of time the service should wait for the creation of a connection to the back-end to complete. By specifying this parameter, the number of timeout errors propagated to the client when using load balancing via Apache is greatly reduced.
iptables services now includes a
reload option which refreshes iptables rules without unloading/reloading the modules and dropping any already-established connections.
In Red Hat Enterprise Linux 5.8, RPM utilizes the xz package to handle compression/decompression of packages that use LZMA encryption.
Red Hat Enterprise Linux 5.8 adds a new python-ctypes package. python-ctypes is a python module which creates and manipulates C data types in Python, and calls functions in dynamic link libraries (DLLs) or shared libraries. It allows wrapping of these libraries in pure Python. This package serves as a dependency of the iotop utility.
A new 64-bit version of unixODBC has been added to Red Hat Enterprise Linux 5.8 via the unixODBC64 package. Along with the unixODBC64 package, two packages providing specific database support have been added: mysql-connector-odbc64 and postgresql-odbc64. Users who need to interoperate with third-party ODBC drivers are advised to install the unixODBC64 package, and then install the postgresql-odbc64 and/or mysql-connector-odbc64 packages if needed.
A new iotop utility has been added. iotop is a Python program with a user interface similar to the one of the top utility, and used to show continuous I/O operation statistics for running processes.
Red Hat Enterprise Linux 5.8 provides a new binutils220 package, capable of using BD instructions when compiling with gcc44. This enables users to build programs which take advantage of the AMD Bulldozer CPU features.
httpdservice restart after an upgrade
httpd service is now automatically restarted after the httpd package is upgraded.
The curl utility now includes negotiate proxy support in order to use Kerberos authentication to communicate with remote machines.
ssl_request_certoption for vsftpd
The vsftpd package now includes a
ssl_request_cert option which allows client certificate checks to be disabled. If enabled, vsftpd requests (but not necessarily requires) a certificate on incoming SSL connections. The default setting for this option (in the
/etc/vsftpd/vsftpd.conf file) is
The hwdata package contains tools for accessing and displaying hardware identification and configuration data. Device IDs have been added for the following hardware:
- Intel Core i3, i5, i7 and other processors formerly code named "Sandy Bridge"
- the latest HP Integrated Lights-Out 4 (iLO) devices
- Atheros 3x3 a/g/n (Madeira) wireless LAN
Appendix A. Revision History
|Revision 1-0||Thu Feb 21 2012|