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

[Thiago Martins]

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 Ubuntu
Server Team, which is subscribed to qemu 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)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1338277/+subscriptions