Hey, recently we've seen some build problems related to all loop devices beeing in use. This originated (very likely) from multiple concurrent jobs running on the same node and using livecd-tools (e.g. livecd-creator) which exhausted all available loop devices. I discussed this with Mike and he suggested to introduce a category (iso_build) which restricts multiple jobs of this same category to be build at once on the same builder. To take advantage of this I added the category (iso_build) to all Node related jobs (ovirt-node-iso, ovirt-node-iso-devel, ovirt-node-iso-fedora-next, and ovirt-node-iso-edit-node) requiring livecd-tools. Mike added the category to the ovirt-live job, which is also using livecd-tools. This should solve - at least - the loop device related problems. Greetings fabian