[Qemu-devel] [Bug 1353947] [NEW] Hypervisor with QEMU-2.0/libvirtd 1.2.2 stack when launching VM with CirrOS or Ubuntu 12.04

[Eyal Perry]

Public bug reported:

The issue observed when running an hypervisor with QEMU 2.0/libvirtd 1.2.2
The VM network interface is attached to a PCI virtual function (SR-IOV).

When we ran VM with guest OS CirrOS or Ubuntu 12.04 we observed an hipervisor 
hang shortly after the VM is loaded
We observed the same issue with Mellanox NIC and with Intel NIC

We’ve tried few combinations of {GuestOS}X{Hypervisor} and we got the following 
findings:
When a hypervisor is running QEMU 1.5/libvirtd 1.1.1 - no issue observed
When a hypervisor is running QEMU 2.0/libvirtd 1.2.2 - CirrOS and Ubuntu 12.04 
guest OSes caused hypervisor hang
When a hypervisor is running QEMU 2.0/libvirtd 1.2.2 - CentOS 6.4 and Ubuntu 
13.10 - no issue observed

The problematic guest OSes are with kernel versions ~3.2.y

** Affects: qemu
     Importance: Undecided
         Status: New

** Attachment added: "screen shot of hypervisor hang"
   
https://bugs.launchpad.net/bugs/1353947/+attachment/4171909/+files/qemu-issue%5B1%5D.png

** Information type changed from Private Security to Public

** Summary changed:

- Hypervisor with QEMU-2.0 stack when launching VM with CirrOS or Ubuntu 12.04
+ Hypervisor with QEMU-2.0/libvirtd 1.2.2 stack when launching VM with CirrOS 
or Ubuntu 12.04

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https://bugs.launchpad.net/bugs/1353947

Title:
  Hypervisor with QEMU-2.0/libvirtd 1.2.2 stack when launching VM with
  CirrOS or Ubuntu 12.04

Status in QEMU:
  New

Bug description:
  The issue observed when running an hypervisor with QEMU 2.0/libvirtd 1.2.2
  The VM network interface is attached to a PCI virtual function (SR-IOV).

  When we ran VM with guest OS CirrOS or Ubuntu 12.04 we observed an hipervisor 
hang shortly after the VM is loaded
  We observed the same issue with Mellanox NIC and with Intel NIC

  We’ve tried few combinations of {GuestOS}X{Hypervisor} and we got the 
following findings:
  When a hypervisor is running QEMU 1.5/libvirtd 1.1.1 - no issue observed
  When a hypervisor is running QEMU 2.0/libvirtd 1.2.2 - CirrOS and Ubuntu 
12.04 guest OSes caused hypervisor hang
  When a hypervisor is running QEMU 2.0/libvirtd 1.2.2 - CentOS 6.4 and Ubuntu 
13.10 - no issue observed

  The problematic guest OSes are with kernel versions ~3.2.y

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