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[Thiago Martins <thiagocmartinsc@xxxxxxxxx>]

Just for the record...

The Windows 2008 R2 (and Windows 7) guests are all 64-bit, with 4G of
RAM each.

I'm trying it using VirtIO for both Disk and Network, configured during
Windows installation (the second Virtual CD Drive contains:
http://alt.fedoraproject.org/pub/alt/virtio-win/latest/virtio-
win-0.1-81.iso )

Even when IDLE, W2K8-R2 crashes and, for example, if you try to install
it as a Secondary Active Directory of another Windows, then, it crashes
more often...

I'm using SPICE / QXL for guest video.

Anyway, I tried it with almost all virtual hardware combinations,
starting from VirtIO devices, to IDE and e1000, VGA and etc... Every
time it crashes.

Also, VirtIO for Network is very unstable, both Windows 7 and Windows
2008 crashes when using it with OpenvSwitch bridges, when using that
"default NAT from libvirt", it works better, so, I'm using e1000 from
now on.

Disabling KSM make it far more stable but, as I said, VirtIO for Net is
still unstable (it gives windows BSOD).

If you guys want (Serge), I can give root access to 1 or 2 Dell R610
with Ubuntu 14.04 + Qemu 2.0, so, you guys will be able to catch this
problem while it happens... Since this problem is hard to reproduce, I'm
available to help debug this, just let me know.

BTW, I'm planning to try it with new QEmu 2.1 ASAP and/or with new Linux
3.16, on different servers, to see which one becomes more stable...
Honestly, I don't know where the problem is located, I mean, it this a
Linux or QEmu BUG?!

Cheers!

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1338277

Title:
  Ubuntu 14.04 + QEmu 2.0 + KSM = 1, makes Windows 2008 R2 guests to
  crash (BSOD)

Status in “linux” package in Ubuntu:
  Confirmed
Status in “qemu” package in Ubuntu:
  Confirmed

Bug description:
  Guys,

  I'm trying to run Windows 2008 as a QEmu guest on my Ubuntu 14.04 but,
  after lots of tests, I figured out that it doesn't work, QEmu makes
  Windows 2008 to crash, and it is not a Windows fault, I'm pretty sure
  that it is a QEmu bug.

  Lab environment (5 servers):

  3 physical servers: Dell R610

  2 physycal servers: IBM x3650

  * Where Windows crash (5 servers tested) ?

  Ubuntu 14.04 + QEmu 2.0 + VirtIO 0.1-81 = Windows 2008 crash every
  hour

  - Installed with "apt-get install ubuntu-virt-server".

  * Where Windows do not crash (5 servers tested) ?

  Ubuntu 14.04 + Xen 4.4 +  gplpv_Vista2008x64_1.0.1092.9 = Windows
  working smoothly

  - Installed with "apt-get install xen-system-amd64".

  So, after removing QEmu from my environment, and using Xen instead,
  all Windows guests are now running without any crash.

  What kind of information, can I provide for you guys, to deep debug
  this QEmu problem ?

  Plus, it is interesting to note that a lot of times, all Windows
  guests (on top of QEmu / KVM) crashes at the exactly the same time!
  So, it can not be a problem within each Windows guest, but at the
  Hypervisor itself! Something happen there, that affects almost all
  Windows guests simultaneously.

  Also, it worth to mention that this problem is probably affecting
  clouds based on OpenStack IceHouse, on top of Ubuntu + QEmu 2.0...

  Screenshots:

  http://i.imgur.com/vnJSTgg.png

  http://i.imgur.com/34nADWr.png

  NOTE: I'm using KSM (Kernel Samepage Merging) with QEmu, to save RAM.
  It seems that when with Xen (+QEmu / HVM), KSM is not used :'( , but
  it is enabled ( 1 > /sys/kernel/mm/ksm/run at Dom0's kernel). I did
  not tried to disable KSM to see if Windows becomes more stable on QEmu
  2.0...

  Also, I did not run tests on this environment with Ubuntu 12.04.4 (or
  12.04.4 with Ubuntu Cloud Archives, to get newer versions of QEmu (but
  not 2.0) for old LTS).

  CURIOSITY: On older hardware, like Dell R1950, and at my old Intel
  Desktop Core i7, I'm running Windows 2008 and 7, on Ubuntu 14.04 with
  QEmu 2.0 without any crash... I really like to figure out why QEmu is
  crashing Windows guests on Dell R610 and on IBM x3650...

  Attaching the VM's configuration files on next posts...

  Best,
  Thiago
  --- 
  AlsaDevices:
   total 0
   crw-rw---- 1 root audio 116,  1 Jul 15 08:32 seq
   crw-rw---- 1 root audio 116, 33 Jul 15 08:32 timer
  AplayDevices: Error: [Errno 2] No such file or directory
  ApportVersion: 2.14.1-0ubuntu3.2
  Architecture: amd64
  ArecordDevices: Error: [Errno 2] No such file or directory
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
  CRDA: Error: [Errno 2] No such file or directory
  DistroRelease: Ubuntu 14.04
  InstallationDate: Installed on 2014-06-23 (22 days ago)
  InstallationMedia: Ubuntu-Server 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.2)
  IwConfig: Error: [Errno 2] No such file or directory
  MachineType: Dell Inc. PowerEdge R610
  Package: qemu
  PciMultimedia:
   
  ProcFB:
   
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-30-generic root=UUID=6a76ba24-a056-468d-b620-84a49c71d873 ro
  ProcVersionSignature: Ubuntu 3.13.0-30.55-generic 3.13.11.2
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-30-generic N/A
   linux-backports-modules-3.13.0-30-generic  N/A
   linux-firmware                             1.127.4
  RfKill: Error: [Errno 2] No such file or directory
  Tags:  trusty
  Uname: Linux 3.13.0-30-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:
   
  _MarkForUpload: True
  dmi.bios.date: 07/23/2013
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: 6.4.0
  dmi.board.name: 0DFXXD
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 23
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvr6.4.0:bd07/23/2013:svnDellInc.:pnPowerEdgeR610:pvr:rvnDellInc.:rn0DFXXD:rvrA00:cvnDellInc.:ct23:cvr:
  dmi.product.name: PowerEdge R610
  dmi.sys.vendor: Dell Inc.

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