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Updated irqbalance packages that fix several bugs and add various enhancements are now available for Red Hat Enterprise Linux 6.
The irqbalance packages provide a daemon that evenly distributes the interrupt request (IRQ) load across multiple CPUs for enhanced performance.
The irqbalance packages have been upgraded to upstream version 1.0.7, which provides a number of bug fixes and enhancements over the previous version. Notably, irqbalance now works with Xen PV guest, broken deepest cache backport has been fixed, and the IRQ migration algorithm has been enhanced. (BZ#1181720)
- Previously, the irqbalance utility did not set signal handlers for particular signals. Consequently, when irqbalance received a signal other than SIGINT or SIGHUP, it terminated without a cleanup. This update provides signal handlers for SIGUSR1, SIGUSR2, and SIGTERM. As a result, irqbalance now stops gracefully after finishing the current balancing iteration.
- Prior to this update, the /sys/bus/pci/devices file handle was not freed properly if the directory was not available. As a consequence, a memory leak occurred. With this update, the file handle is freed as expected when irqbalance cannot open the directory, and memory leaks no longer occur in the described situation.
Users of irqbalance are advised to upgrade to these updated packages, which fix these bugs and add these enhancements.