| Release Notes for Red Hat Enterprise Linux 6.3Edition 3 Red Hat Engineering Content ServicesLegal NoticeCopyright © 2012 Red Hat, Inc. The text of and illustrations in this document are licensed by Red Hat under a Creative Commons Attribution-Share Alike 3.0 Unported license ("CC-BY-SA"). An explanation of CC-BY-SA is available at http://creativecommons.org/licenses/by-sa/3.0/. In accordance with CC-BY-SA, if you distribute this document or an adaptation of it, you must provide the URL for the original version. Red Hat, as the licensor of this document, waives the right to enforce, and agrees not to assert, Section 4d of CC-BY-SA to the fullest extent permitted by applicable law. Red Hat, Red Hat Enterprise Linux, the Shadowman logo, JBoss, MetaMatrix, Fedora, the Infinity Logo, and RHCE are trademarks of Red Hat, Inc., registered in the United States and other countries. Linux® is the registered trademark of Linus Torvalds in the United States and other countries. Java® is a registered trademark of Oracle and/or its affiliates. XFS® is a trademark of Silicon Graphics International Corp. or its subsidiaries in the United States and/or other countries. MySQL® is a registered trademark of MySQL AB in the United States, the European Union and other countries. All other trademarks are the property of their respective owners. 1801 Varsity Drive Raleigh, NC 27606-2072 USA Phone: +1 919 754 3700 Phone: 888 733 4281 Fax: +1 919 754 3701
Daftar IsiAbstract The Release Notes provide high-level coverage of the improvements and additions that have been implemented in Red Hat Enterprise Linux 6.3. For detailed documentation on all changes to Red Hat Enterprise Linux for the 6.3 update, refer to the Technical Notes. Red Hat Enterprise Linux minor releases are an aggregation of individual enhancement, security and bug fix errata. The Red Hat Enterprise Linux 6.3 Release Notes documents the major changes made to the Red Hat Enterprise Linux 6 operating system and its accompanying applications for this minor release. Detailed notes on changes (that is, bugs fixed, enhancements added, and known issues found) in this minor release are available in the Technical Notes. The Technical Notes document also contains a complete list of all currently available Technology Previews along with packages that provide them. The online Red Hat Enterprise Linux 6.3 Release Notes, which are located online here, are to be considered the definitive, up-to-date version. Customers with questions about the release are advised to consult the online Release and Technical Notes for their version of Red Hat Enterprise Linux. Sufficient memory must be available because kdump reserves approximately 128 MB as default. This is especially important when performing an upgrade to Red Hat Enterprise Linux 6.3. Sufficient disk space must also be available for storing the dump in case of a system crash. Kdump is limited to DASD or QETH networks as dump devices until kdump on SCSI disk is supported. The following warning message may appear when kdump is initialized: ..no such file or directory This message does not impact the dump functionality and can be ignored. You can configure or disable kdump via /etc/kdump.conf , system-config-kdump, or firstboot. man trace-cmd-recordman trace-cmd-stack Available memory in the system is rounded up to 128 MB when calculating the 2 GB threshold for deciding whether to enable kdump or not. If a system has 1920 MB (2G-128M) RAM available, kdump is enabled. Run the following commands if you wish to disable kdump (for example, due to memory constraints): To stop the kdump service, execute the following command: ~]# service kdump stop To disable the kdump service, execute the following command: ~]# chkconfig kdump off To return memory previously reserved for kdump back to the system, execute the following command: ~]# echo 0 > /sys/kernel/kexec_crash_size
Chapter 2. Device DriversYou must run the latest Emulex firmware (revision 4.1.417.0 or later). The server system BIOS must support the SR-IOV functionality and have virtualization support for Direct I/O VT-d. You must use the GA version of Red Hat Enterprise Linux 6.3.
SR-IOV runs on all Emulex-branded and OEM variants of BE3-based hardware, which all require the be2net driver software. Red Hat Enterprise Linux 6.3 includes the mtip32xx driver which adds support for Micron RealSSD P320h PCIe SSD drives. The lpfc driver for Emulex Fibre Channel Host Bus Adapters has been updated to version 8.3.5.68.2p. The mptfusion driver has been updated to version 3.04.20. The bnx2fc for the Broadcom Netxtreme II 57712 chip has been updated to version 1.0.11. The qla2xxx driver for QLogic Fibre Channel HBAs has been updated to version 8.04.00.02.06.3-k. The qla2xxx driver update for Red Hat Enterprise Linux 6.3 now takes advantage of the common code in the SCSI mid-layer that handles queue-full status messages returned from a target port. Before, this code resided in the qla2xxx driver itself. To maintain API compatibility, stubs for the ql2xqfulltracking and ql2xqfullrampup module parameters have been left in the driver itself. In addition, this update also adds support for ISP82xx and ISP83xx, and adds the dynamic logging functionality. The qla4xxxx has been updated to version 5.02.00.00.06.03-k1, which adds support for displaying port_state , port_speed , and targetalias in the sysfs file system. The megaraid driver has been updated to version 00.00.06.14-rh1. The ipr driver for IBM Power Linux RAID SCSI HBAs has been updated to enable the SAS VRAID functions. The cciss driver has been updated to add older controllers to the kdump blacklist. The hpsa driver has been updated to the version 2.0.2-4 to add older controllers to the kdump blacklist. The bnx2i driver for Broadcom NetXtreme II iSCSI has been updated to version 2.7.2.1. The mpt2sas driver has been updated to version 12.101.00.00, adding NUNA I/O support which uses multi-reply queue support of HBAs. The mptsas driver has been updated to add the following device ID: SAS1068_820XELP . The Brocade BFA FC SCSI driver (bfa driver) has been updated. The be2iscsi driver for ServerEngines BladeEngine 2 Open iSCSI devices has been updated. The ahci.c driver have been updated to add the AHCI-mode SATA DeviceID for the Intel DH89xxCC PCH. The isci driver has been updated to version 1.1 to pick up the latest Intel hardware support, enhancements, and bug fixes. The isci sata driver has been updated to add T10 DIF support. The libfc , libfcoe , and fcoe drivers have been updated to fix various bugs and add several enhancements. The libsas driver has been updated. The qib driver for TrueScale HCAs has been updated. The libata module has been updated to fix various bugs. The dm-raid code of the md driver has been updated to include flush support. The following drivers have been updated to the latest version: ahci , md /bitmap , raid0 , raid1 , raid10 , and raid456 . The aacraid driver has been updated to version 1.1-7[28000].
The netxen driver for NetXen Multi port (1/10) Gigabit Network has been updated to version 4.0.77 or greater. The bnx2x driver has been updated to version 7.2.16 to include support for the 578xx family of chips. The be2net driver for ServerEngines BladeEngine2 10Gbps network devices has been updated to version 4.2.5.0r. The ixgbevf driver has been updated to version 2.2.0-k to include the latest hardware support, enhancements, and bug fixes. The cxgb4 driver for Chelsio Terminator4 10G Unified Wire Network Controllers has been updated. The cxgb3 driver for the Chelsio T3 Family of network devices has been updated. The ixgbe driver for Intel 10 Gigabit PCI Express network devices has been updated to version 3.6.7-k to include the latest hardware support, enhancements, and bug fixes. The e1000e driver for Intel PRO/1000 network devices has been updated. The e1000 driver for Intel PRO/1000 network devices has been updated. The e100 driver has been updated. The enic driver for Cisco 10G Ethernet devices has been updated to version 2.1.1.35, adding SR-IOV support. The igbvf driver (Intel Gigabit Virtual Function Network driver) has been updated to version 2.0.1-k. The igb driver for Intel Gigabit Ethernet Adapters has been updated to version 3.2.10-k, providing up-to-date hardware support, enhancements, and bug fixes. The bnx2 driver for the NetXtreme II 1 Gigabit Ethernet controllers has been updated to version 1.0.11. The tg3 driver for Broadcom Tigon3 Ethernet devices has been updated to version 3.120+. The qlcnic driver for the HP NC-Series QLogic 10 Gigabit Server Adapters has been updated to version 5.0.26. The bna driver has been updated. The r8169 driver has been updated to add support for the latest Realtek NICs (8168D/8168DP/8168E/8168EV) and increase reliability of older NICs. The qlge driver has been updated to version 1.00.00.30. The cnic driver has been updated to version 2.5.9, which improves error recovery on bnx2x devices, adds FCoE parity error recovery, increases the maximum amount of FCoE sessions, and adds other enhancements. The iwl6000 and iwlwifi drivers have been updated to add support for the Intel Centrino Wireless-N 6235 series of Wi-Fi adapters. The iwlwifi also adds an option with 5GHz band can be disabled. The wireless LAN subsystem has been updated. It introduces the dma_unmap state API and adds a new kernel header file: include/linux/pci-dma.h . The atl1c driver has been updated to the latest upstream version, which adds support for Atheros AR8151 v2 and Atheros AR8152 PCI-E Gigabit Ethernet Controllers.
The i915 driver has been updated. Various graphics drivers have been updated with DRM support rebased to version 3.3-rc2. The Wacom driver has been updated, deprecating the wacompl package and obsoleting the wdaemon package. The ALSA HDA audio driver has been updated to enable or improve support for new chipsets and HDA audio codecs. The btusb driver has been updated to include support for the Broadcom BCM20702A0 single-chip bluetooth processor. The k10temp driver from the hwmon subsystem has been updated to add support for AMD family 12h/14h/15h of CPUs. The ALPS Touchpad driver has been updated to add support for ALPS Touchpad protocol versions 3 and 4, and add support for touchpads with 4-directional buttons. The jsm driver has been updated to add Enhanced Error Handling (EEH). The mlx4_en driver has been updated to version 2.0. The mlx4_core driver has been updated to version 1.1.
Chapter 4. Resource ManagementChapter 5. Authentication and Interoperability~]# echo "RequiredAuthentications2 publickey,password" >> /etc/ssh/sshd_config For more information on the aforementioned /etc/ssh/sshd_config options, refer to the sshd_config man page. Cached automount maps make it easy for a client machine to perform mount operations even when the LDAP server is unreachable, but the NFS server remains reachable. When the autofs daemon is configured to look up automount maps via SSSD, only a single file has to be configured: /etc/sssd/sssd.conf . Previously, the /etc/sysconfig/autofs file had to be configured to fetch autofs data. Caching the automount maps results in faster performance on the client and lower traffic on the LDAP server.
Several changes to internal debug logging features necessitated that the debug_level option must always be specified independently in each section of the configuration file, instead of acquiring its default from the [sssd] section. As a result, after updating to the latest version of SSSD, users may need to update their configurations in order to continue receiving debug logging at the same level. Users that configure SSSD on a per-machine basis can use a simple Python utility that updates their existing configuration in a compatible way. This can be accomplished by running the following command as root: ~]# python /usr/lib/python2.6/site-packages/sssd_update_debug_levels.py This utility makes the following changes to the configuration file: it checks to see if the debug_level option was specified in the [sssd] section. If so, it adds that same level value to each other section in the sssd.conf file for which debug_level is unspecified. If the debug_level option already exists explicitly in another section, it is left unchanged. Users who rely on central configuration management tools need to make these same changes manually in the appropriate tool. Chapter 6. Subscription ManagementChapter 7. VirtualizationIntel Core i3, i5, i7 and other processors formerly code named "Sandy Bridge", and new AMD family 15h processors (code named "Bulldozer").
The new CPU model definitions in KVM provide the necessary new processor enablement to KVM host and the virtualized guests. This ensures that KVM Virtualization derives the performance benefits associated with the new processors, and takes advantage of the new instructions in the latest CPUs. The KVM steal time feature provides accurate data to a guest regarding CPU utilization and virtual machine performance. Large amounts of steal time indicates that the virtual machine performance is curtailed by the CPU time assigned to the guest by the hypervisor. The user can relieve the performance issues caused by CPU contention by running fewer guests on the host or by increasing the CPU priority of the guest. The KVM steal time value provides users with data to allow them to take the next step in improving their application run-time performance. The qemu-ga daemon is used by libvirt to request that the guest VM suspend to disk or suspend to RAM. In addition to suspend operations, the daemon can respond to shutdown commands and file system freeze requests during a virtual machine live snapshot (to get a consistent disk state). Note that the -cpu host flag must be set when using this feature. With this feature, Red Hat virtualization customers running Red Hat Enterprise Linux 6 guests can use the CPU's PMU counter while using the performance tool for profiling. The virtual performance monitoring unit feature allows virtual machine users to identify sources of performance problems in their guests, thereby improving the ability to profile a KVM guest from the host. This feature is a Technology Preview in Red Hat Enterprise Linux 6.3 and is only supported with guests running Red Hat Enterprise Linux 6. The virtual CPU hot-plugging feature gives system administrators the ability to dynamically adjust CPU resources in a guest. Because a guest no longer has to be taken offline to adjust the CPU resources, the availability of the guest is increased. This feature is a Technology Preview in Red Hat Enterprise Linux 6.3. Currently, only the vCPU hot-add functionality works. The vCPU hot unplug feature is not yet implemented. Virtio-SCSI is now capable of inheriting the feature set of the target device with the ability to: attach a virtual hard drive or CD through the virtio-scsi controller, pass-through a physical SCSI device from the host to the guest via the QEMU scsi-block device, and allow the usage of hundreds of devices per guest; an improvement from the 28-device limit of virtio-blk.
This feature is a Technology Preview in Red Hat Enterprise Linux 6.3. Additionally, guests can be awakened from the S3 state with events from a remote keyboard through SPICE. This feature is a Technology Preview and is disabled by default in Red Hat Enterprise Linux 6.3. To enable it, select the /usr/share/seabios/bios-pm.bin file for the VM bios instead of the default /usr/share/seabios/bios.bin file. The native, in-guest S4 (suspend to disk) and S3 (suspend to RAM) power management features support the ability to perform suspend to disk and suspend to RAM functions in the guest (as opposed to the host), reducing the time needed to restore a guest by responding to simple keyboard input. This also removes the need to maintain an external memory-state file. This capability is supported on Red Hat Enterprise Linux 6.3 guests and Windows guests running on any hypervisor capable of supporting S3 and S4. Chapter 8. Clustering and High AvailabilityA confirmation dialog box appears when removing a clustered service. The UI includes an improved restart icon. The Add a child resource button has been simplified. An option to enable debugging from the UI has been added.
This feature is for use on a single-system. It is not available for multi-system access in cluster environments. For more information, refer to documentation of the -s/--snapshot option in the lvcreate man page. The purpose of the lvmetad daemon is to eliminate the need for this scanning by dynamically aggregating metadata information each time the status of a device changes. These events are signaled to lvmetad by udev rules. If lvmetad is not running, LVM performs a scan as it normally would. This feature is provided as a Technology Preview and is disabled by default in Red Hat Enterprise Linux 6.3. To enable it, refer to the use_lvmetad parameter in the /etc/lvm/lvm.conf file, and enable the lvmetad daemon by configuring the lvm2-lvmetad init script. Chapter 10. General UpdatesUsers who choose to continue to use the Matahari agents should note the following: The matahari packages are not installed by default starting with Red Hat Enterprise Linux 6.3 and are not enabled by default to start on boot when they are installed. Manual action is needed to both install and enable the matahari services. The default configuration for qpid (the transport agent used by Matahari) does not enable access control lists (ACLs) or SSL. Without ACLs/SSL, the Matahari infrastructure is not secure. Configuring Matahari without ACLs/SSL is not recommended and may reduce your system's security. The matahari-services agent is specifically designed to allow remote manipulation of services (start, stop). Granting a user access to Matahari services is equivalent to providing a remote user with root access. Using Matahari agents should be treated as equivalent to providing remote root SSH access to a host. By default in Red Hat Enterprise Linux, the Matahari broker (qpidd running on port 49000 ) does not require authentication. However, the Matahari broker is not remotely accessible unless the firewall is disabled, or a rule is added to make it accessible. Given the capabilities exposed by Matahari agents, if Matahari is enabled, system administrators should be extremely cautious with the options that affect remote access to Matahari.
Note that Matahari will not be shipped in future releases of Red Hat Enterprise Linux (including Red Hat Enterprise Linux 7), and may be considered for formal removal in a future release of Red Hat Enterprise Linux 6. When operating on 0-d arrays, numpy.max and other functions accept only the following parameters: axis=0 , axis=-1 , and axis=None . Using out-of-bounds axes indicates a bug, for which NumPy now raises an error. Specifying the axis > MAX_DIMS parameter is no longer allowed; NumPy now raises an error, instead of behaving the same as when axis=None was specified.
The $HUPisRestart directive has been removed and is no longer supported. Restart-type HUP processing is therefore no longer available. Now, when the SIGHUP signal is received, outputs (log files in most cases) are only re-opened to support log rotation. The format of the spool files (for example, disk-assisted queues) has changed. In order to switch to the new format, drain the spool files, for example, by shutting down rsyslogd . Then, proceed with the Rsyslog upgrade, and start rsyslogd again. Once upgraded, the new format is automatically used. When the rsyslogd daemon was running in the debug mode (using the -d option), it ran in the foreground. This has been fixed and the daemon is now forked and runs in the background, as is expected.
This appendix is a list of components and their versions in the Red Hat Enterprise Linux 6.3 release. Table A.1. Component Versions Component | Version |
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Kernel | 2.6.32-279 | QLogic qla2xxx driver | 8.04.00.02.06.3-k | QLogic qla2xxx firmware | ql23xx-firmware-3.03.27-3.1 ql2100-firmware-1.19.38-3.1 ql2200-firmware-2.02.08-3.1 ql2400-firmware-5.06.05-1 ql2500-firmware-5.06.05-1 | Emulex lpfc driver | 8.3.5.68.2p | iSCSI initiator utils | 6.2.0.872-41 | DM-Multipath | 0.4.9-56 | LVM | 2.02.95-10 |
Revision History |
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Revision 6-0 | Mon Feb 18 2013 | Martin Prpič | Removed incorrect information about rt2800usb /rt2x00 being updated. |
| Revision 1-0 | Wed Jun 20 2012 | Martin Prpič | Release of the Red Hat Enterprise Linux 6.3 Release Notes. |
| Revision 0-0 | Tue Apr 24 2012 | Martin Prpič | Release of the Red Hat Enterprise Linux 6.3 Beta Release Notes. |
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