You have been subscribed to a public bug: 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 ** Affects: qemu (Ubuntu) Importance: Undecided Status: New ** Tags: 2008 bsod crash qemu windows -- Ubuntu 14.04 + QEmu 2.0 + KSM = 1, makes Windows 2008 R2 guests to crash (BSOD) https://bugs.launchpad.net/bugs/1338277 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu in Ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
