You don't need a >1TB host to spin up a >1TB guest. Unless you're using pci passthru (and/or SRIOV), or something else that requires qemu to alloc and pin all guest mem, you can simply overcommit; normal guests don't require mem pre-allocation or pinning.
On your host do this to allow overcommitting such a large amount (this allows 16T but can be adjusted as needed): $ echo $[ 16 * 1024 * 1024 * 1024 ] | sudo tee /proc/sys/vm/overcommit_kbytes 17179869184 $ echo 1 | sudo tee /proc/sys/vm/overcommit_memory 1 Then just virsh edit your guest to use >1TB, e.g.: <memory unit='GiB'>1500</memory> And of course, stop and restart the guest to pick up the xml change. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1769053 Title: Cannot start a guest with more than 1TB of RAM To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1769053/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
