** Also affects: qemu
Importance: Undecided
Status: New
** No longer affects: qemu
** Also affects: ubuntu-power-systems
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1801674
Title:
Ubuntu16.04 LTS - PCI Pass Through in Ubuntu KVM 16.04.x must use QEMU
with DDW support from PPA
Status in The Ubuntu-power-systems project:
New
Status in qemu package in Ubuntu:
New
Bug description:
== Comment: #0 - Siraj M. Ismail <sir...@us.ibm.com> - 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 = sir...@us.ibm.com
---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://launchpad.net/~ibmpackages/+archive/ubuntu/ddw
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 sir...@us.ibm.com:
-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 <lagar...@br.ibm.com> -
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://launchpad.net/~ibmpackages/+archive/ubuntu/ddw
-------------------------------
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