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[Qemu-devel] [Bug 1801674] Re: Ubuntu16.04 LTS - PCI Pass Through in Ubu


From: Frank Heimes
Subject: [Qemu-devel] [Bug 1801674] Re: Ubuntu16.04 LTS - PCI Pass Through in Ubuntu KVM 16.04.x must use QEMU with DDW support from PPA
Date: Mon, 05 Nov 2018 08:28:57 -0000

** 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 <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 = 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://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 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 <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://launchpad.net/~ibmpackages/+archive/ubuntu/ddw

  -------------------------------

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