Changes look good, ACK. I've uploaded the yakkety package to the
archive, and have uploaded the xenial package for sponsoring by the SRU
team. Thanks!
** Changed in: virt-manager (Ubuntu Xenial)
Status: New => In Progress
** Changed in: virt-manager (Ubuntu)
Status: In Progress => Fix Committed
** Description changed:
+ [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.
+
+ ---
+
== Comment: #0 - JENIFER HOPPER <[email protected]> - 2016-06-28 11:58:08 ==
---Problem Description---
For best performance, we would like Power guests to default to virtio for
disk and network type when using virt-install. All supported ppc64le guest OSes
have virtio support.
For the disk default, there is an upstream commit:
commit f6322c9ed8e6d38083e6365ab9f08e5a09d147be
Author: Shivaprasad G Bhat <[email protected]>
Date: Thu Apr 21 13:30:34 2016 +0530
virtinst: Use virtio bus type for disks on pSeries machines
pSeries doesn't support ide and so was changed to use the scsi.
virtio works better on pSeries with better performance outcomes. Change
the default to virtio for disks
Signed-off-by: Shivaprasad G Bhat <[email protected]>
http://www.spinics.net/lists/virt-tools/msg09433.html
--
I am checking on the current upstream status for the network default.
Looks like right now on 16.04, virt-install defaults to rtl8139 even if
--os-variant is used.
---uname output---
Linux p82qvirt 4.4.0-24-generic #43-Ubuntu SMP Wed Jun 8 19:25:36 UTC 2016
ppc64le ppc64le ppc64le GNU/Linux
Machine Type = 8247-22L
---Debugger---
A debugger is not configured
---Steps to Reproduce---
Start a guest using virt-install using all defaults.
# dpkg -l | grep virtinst
ii virtinst 1:1.3.2-3ubuntu1.16.04.1
all Programs to create and clone virtual machines
Contact Information = [email protected]
== Comment: #4 - Shivaprasad G. Bhat <[email protected]> - 2016-06-29
03:32:28 ==
Hi Jennifer,
The below patch also needs to pulled into Ubuntu as the CDROMs cannot work on
virtio bus on PPC.
https://github.com/virt-manager/virt-manager/commit/94f610465f45264142ff5def7b5ceaf9ecfe065b
Thanks,
Shiva
== Comment: #8 - SANDHYA VENUGOPALA <[email protected]> - 2016-06-30
01:21:01 ==
Canonical,
Please include the upstream disk and cdrom patches listed in this bug
report.
please note that network portion is still a work in progress and a patch
will made available for inclusion soon.
Changing the network default would significantly help out of the box
performance, but as of now many users are probably aware that virtio is
a good tuning option.
--
- [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.
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1597610
Title:
virt-install default to virtio type - disk
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