Ubuntu
virt-manager package

  1. Bug #1597610
  2. Comment #6

Comment 6 for bug 1597610

Revision history for this message
bugproxy (bugproxy) wrote : Comment bridged from LTC Bugzilla

------- Comment From <email address hidden> 2016-07-25 15:58 EDT-------
I edited the description in launchpad to include the following:

[Impact]

By default, currently Power guests are defined with bus=?scsi? disk type. Virtio disks will perform much better in KVM environments than the scsi (papr) model so the default should be changed to improve out-of-the-box guest performance.

[Test Case]

Create a guest using virt-install or virt-manager, check the default disk type with ?virsh dumpxml <guest>?.

Ex. virt-install command:
virt-install --force --name test --ram 4096 --vcpus 4 --location <location path> --noautoconsole --wait=-1 --noreboot --nographic --disk path=/var/lib/libvirt/images/test.raw,size=10

[Regression Potential]

Virtio tends to get more test cycles in general, so changing the default may actually reduce the risk of regressions with the papr scsi type.

[Other Info]

All guests that can run on Power support the virtio-blk disk type.

--
Also removing the network portion from the bug title, we will need to follow up on that later once changes make their way upstream.