Libvirt usb passthrough also doesn't need this.
On Fri, May 17, 2013 at 1:29 PM, Matthew Thode <prometheanf...@gentoo.org>wrote: > On 05/16/13 22:43, Blair Bethwaite wrote: > > 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. > > > > > > > > _______________________________________________ > > Mailing list: https://launchpad.net/~openstack > > Post to : openstack@lists.launchpad.net > > Unsubscribe : https://launchpad.net/~openstack > > More help : https://help.launchpad.net/ListHelp > > > No, it's generally only for device pass-through. > > -- > -- Matthew Thode (prometheanfire) > > > _______________________________________________ > Mailing list: https://launchpad.net/~openstack > Post to : openstack@lists.launchpad.net > Unsubscribe : https://launchpad.net/~openstack > More help : https://help.launchpad.net/ListHelp > >
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