[Bug 1597610] Re: virt-install default to virtio type - disk
Marc Deslauriers
marc.deslauriers at canonical.com
Tue Jul 26 12:28:49 UTC 2016
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 <jhopper at us.ibm.com> - 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 <sbhat at linux.vnet.ibm.com>
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 <sbhat at linux.vnet.ibm.com>
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 = jhopper at us.ibm.com
== Comment: #4 - Shivaprasad G. Bhat <shivapbh at in.ibm.com> - 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 <vsandhya at in.ibm.com> - 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
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https://bugs.launchpad.net/bugs/1597610
Title:
virt-install default to virtio type - disk
Status in virt-manager package in Ubuntu:
Fix Committed
Status in virt-manager source package in Xenial:
In Progress
Bug description:
[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 <jhopper at us.ibm.com> - 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 <sbhat at linux.vnet.ibm.com>
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 <sbhat at linux.vnet.ibm.com>
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 = jhopper at us.ibm.com
== Comment: #4 - Shivaprasad G. Bhat <shivapbh at in.ibm.com> - 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 <vsandhya at in.ibm.com> - 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.
--
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