Hi everyone, https://gerrit.ovirt.org/#/q/topic:drivemonitor_event+status:open is ready for review. It is the first part of the series needed to consume the BLOCK_THRESHOLD event available with libvirt >= 3.2.0 and QEMU >= 2.3.0. Once completed, this patchset will allow Vdsm to avoid polling, thus greatly improving the system performance and eventually close https://bugzilla.redhat.com/show_bug.cgi?id=1181665 Please note that: 1. CI fails because the workers are not yet updated to CentOS 7.4 (not yet released AFAIK!) which will provide libvirt >= 3.2.0. 2. Few more simple patches will be needed to enable/disable monitoring in specific flows where we cannot use events (e.g. LSM) 3. I did initial verification successfully, installing fedora 25 on thin provisioned disk without issue. -- Francesco Romani Senior SW Eng., Virtualization R&D Red Hat IRC: fromani github: @fromanirh