[Bug 1338277] Re: Ubuntu 14.04 + QEmu 2.0 + KSM = 1, makes Windows 2008 R2 guests to crash (BSOD)

Tue Jul 15 15:38:18 UTC 2014

apport information

** Tags added: apport-collected

** Description changed:

  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.

** Attachment added: "BootDmesg.txt"
   https://bugs.launchpad.net/bugs/1338277/+attachment/4153180/+files/BootDmesg.txt

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

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