Clone this bug since we are using the fix on master for few month, and I think this fix is safe.
verified on top of vt16.2 by profiling vdsm looks like getAllVolumes doesn't listed at the longest chart anymore.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://rhn.redhat.com/errata/RHBA-2015-1729.html