Hi all, We're running a KVM based OpenStack cloud. I recently realised we don't have the IOMMU turned on in our hypervisors. All indications I know about and can find suggest it's only really useful if you want guests accessing host devices directly, e.g., PCI pass-through. But I wonder if there are any other performance advantages to be gained...? Virtio, for one, doesn't seem to use this/need this. -- Cheers, ~Blairo -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openstack.org/pipermail/openstack-operators/attachments/20130517/0ecf882a/attachment.html>