Prior to this update, I/O scheduler changes were not applied to device mapper (dm) devices, which affected the enterprise-storage, latency-performance and throughput-performance profiles. This error has been fixed, device mapper devices have been added to the "ELEVATOR_TUNE_DEVS" list, and I/O scheduler changes are now applied to all devices as expected. (BZ#638975)

For device mapper and multipath devices used on the system, I/O scheduler changes in tuned were not applied on these devices. This bug affected several tuned profiles. To fix this bug, device mapper devices have been added into the list of tuned devices and the I/O scheduler changes are now applied on device mapper devices as well. (BZ#636548)

Read-ahead in tuned was not set correctly, nor was it set it for all appropriate logical unit numbers (LUNs). As a consequence, devices mapped with the device mapper could not be handled. Now, instead of setting static read-ahead value for all devices, the previous value is multiplied and tuned sets an acceptable read-ahead value for all disks including device mapper devices. (BZ#658843)

When the tuned script terminated unexpectedly, "service tuned status" returned exit code 2 while it should have been 1; the presence of the pidfile was not checked correctly. With this update, this bug has been fixed and a tuned status check will now return correct status code when it crashes. (BZ#621122)

When the tuned daemon was enabled on an IBM S/390 system, due to its hardware limitations, plug-ins for CPU and disk did not work at all and the network plug-in made very little difference to be useful. Architecture compatibility check has been integrated into tuned; the daemon is now disabled and will not start on IBM S/390. (BZ#624494)

When parsing an unsupported network card link mode, tuned terminated unexpectedly. With this update, a fix has been provided to address this bug and the crash no longer occurs. (BZ#689715)

Previously, the network device naming scheme in tuned assumed all Ethernet devices were named "ethX". This was non-compliant with the naming convention for network interfaces in Red Hat Enterprise Linux 6, which introduces new names for network ports with respect to their usage or user-defined labels. With this update, tuned supports different names for Ethernet cards and users of tuned network plug-in can recognize their cards as configured in their tuned.conf file. (BZ#682380)

Previously, four executables (diskdevstat, netdevstat, scomes, varnetload) were missing man pages. With this update, the man pages have been added. (BZ#625850)

Previously, man pages for tuned included inaccuracies in the profile descriptions and descriptions for several plug-ins were missing. This update corrects these inaccuracies and adds the plug-in descriptions to the tuned man pages. (BZ#619812)

This update introduces new udev rules and other settings to configure non-SATA devices separately from SATA devices. Now, when a user installs tuned, the default configuration is optimized for non-SATA devices. (BZ#643462)