[Bug 714335] Re: KVM SMP Linux Guests Hang

[altivec]

My configuration might be a little off-topic, but I'm experiencing a
similar problem so I thought I'd leave a comment here anyway.

I'm using qemu 0.13 on a Debian Squeeze host (kernel 2.6.32-5-amd64)
running on a 64-bit Intel Xeon. The guest is a 64-bit Win 2008 R2. When
I run the VM using qemu-system-x86_64 with -enable-kvm and no -smp
options, the guest boots and installs fine. When I enable more than one
core through -smp, the guest boots but completely freezes very soon. It
seems to hang always, but not exactly at the same point. After the guest
hangs, the qemu process keeps using 100% CPU. The same behavior happens
on a different 64-bit Intel Xeon host running Debian Lenny with a custom
2.6.36 kernel. Also, the same behavior happens with qemu 0.14-rc1. I
haven't tested yet if a Linux guest kernel hangs, but will do that.

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https://bugs.launchpad.net/bugs/714335

Title:
  KVM SMP Linux Guests Hang