RHBA-2014:0864 - Bug Fix Advisory

Topic

Updated vdsm packages that fix various bugs are now available.

Description

VDSM is a management module that serves as a Red Hat Enterprise Virtualization
Manager agent on Red Hat Enterprise Virtualization Hypervisor or Red Hat
Enterprise Linux hosts.

Changes to the vdsm component:

• Previously, hypervisors reported what appeared to be very high shared memory

usage when memory page sharing wasn't enabled. This happened because MOM reports
the ksm_pages_sharing value in raw pages, while both VDSM and Manager expect
megabytes. Now, memShared units reported from MOM undergo the necessary
conversion to display in VDSM and Manager in MiB. (BZ#1102651)

• Previously, balloon stats retrieval was gathered by a costly direct libvirt

call in the getStats() body, resulting in a significant slowdown in this
frequent API call. Now, the balloon information getter has been reimplemented as
a sampling function, and moved into the VmStatsThread to make things more
robust. (BZ#1110848)

All Red Hat Enterprise Virtualization Manager users are advised to upgrade to
these updated packages, which resolve these issues.

Solution

Before applying this update, make sure all previously-released errata relevant
to your system have been applied.

This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
https://access.redhat.com/site/articles/11258

Affected Products

• Red Hat Virtualization 3.3 x86_64
• Red Hat Virtualization 3 for RHEL 6 x86_64

Fixes

• BZ - 1102651 - High shared memory being reported on hypervisor
• BZ - 1110848 - [scale] balloon stats retrieval should be done outside of the actual API call

CVEs

(none)

References

(none)