Ubuntu16.04 LTS - PCI Pass Through in Ubuntu KVM 16.04.x must use QEMU with DDW support from PPA (Documentation)
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
The Ubuntu-power-systems project |
Fix Released
|
Undecided
|
Unassigned | ||
qemu (Ubuntu) |
Fix Released
|
Undecided
|
Ubuntu on IBM Power Systems Bug Triage |
Bug Description
== Comment: #0 - Siraj M. Ismail <email address hidden> - 2016-10-05 11:35:38 ==
---Problem Description---
Customer running PCI pass through with 16.04.1 KVM and with the stock QEMU packages will hit a DI if they do not update to the QEMU packages with DDW support. The packages are in PPA for customers to download, and test has verified the fix. The details are in Bugzilla 144123.
---uname output---
Ubuntu 16.04.1 with 4.4.0 Kernel
Machine Type = 8247-22L
---Debugger---
A debugger is not configured
---Steps to Reproduce---
Run guest with adapters assigned via PCI PT, The guest will start having DI issues as soon as I/O started on the Pass Through adapter.
Contact Information = <email address hidden>
---Patches Installed---
QEMU was updated from 2.5 version to 2.6.1 with patches for DDW support, can be found at PPA location :
https:/
Userspace tool common name: QEMU
Documentation version: N/A
The userspace tool has the following bit modes: N/A
Userspace rpm: N/A
Userspace tool obtained from project website: na
*Additional Instructions for <email address hidden>:
-Post a private note with access information to the machine that the bug is occuring on.
-Attach ltrace and strace of userspace application.
== Comment: #5 - Leonardo Augusto Guimaraes Garcia <email address hidden> - 2017-04-25 16:23:57 ==
I would rephrase to:
-------
Under KVM recommendations
PCI passthrough recommendations
If you are running PCI passthrough with 16.04.x KVM and with the stock QEMU package, update to the QEMU package that have DDW support. If you do not update the package, you will hit data integrity issues as soon as I/O is started on the adapter.
The package is available at: https:/
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tags: | added: architecture-ppc64le bugnameltc-147287 severity-critical targetmilestone-inin16041 |
Changed in ubuntu: | |
assignee: | nobody → Ubuntu on IBM Power Systems Bug Triage (ubuntu-power-triage) |
affects: | ubuntu → qemu (Ubuntu) |
no longer affects: | qemu |
summary: |
Ubuntu16.04 LTS - PCI Pass Through in Ubuntu KVM 16.04.x must use QEMU - with DDW support from PPA + with DDW support from PPA (Documentation) |
Some time ago DDW was discussed in this ticket: /bugs.launchpad .net/ubuntu/ +source/ qemu/+bug/ 1541902 e-inin16041" to "targetmileston e-inin1610" .
https:/
And it got introduced in Yakkety and higher only.
Due to pretty complex changes and changes in the virtual machine attributes there is no plan to get it into xenial.
Also 'bugproxy' changed "targetmileston
We are wondering why this now came up again?