Fixing Bug #740887 it has been added the file /etc/sysctl.d/vdsm which works fine on RHEL and CentOS but it's not read on Fedora because it should be /etc/sysctl.d/vdsm.conf ( see sysctl --system output )
rc build done, moving to ON_QA, packages will be available on updates-testing repository.
oVirt 3.3.2 has been released resolving the problem described in this bug report.