[Bug 411417] Re: virsh restore causes kernel panic in guest.

[Dig Ge]

Hi all,

  I can reproduce this issue on lucid x86_64.

Environment:
  Host: Ubuntu Lucid x86_64 desktop with kernel "2.6.38-10-generic #46-Ubuntu SMP Tue Jun 28 15:07:17 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux"

ii  kvm                                   1:84+dfsg-0ubuntu16+0.14.0+noroms+0ubuntu4.4
ii  libvirt-bin                           0.8.8-1ubuntu6.5
ii  libvirt0                              0.8.8-1ubuntu6.5
ii  libvirtodbc0                          6.1.2+dfsg1-1ubuntu4
ii  python-libvirt                        0.8.8-1ubuntu6.5
ii  qemu                                  0.14.0+noroms-0ubuntu4.4
ii  qemu-common                           0.14.0+noroms-0ubuntu4.4
ii  qemu-kvm                              0.14.0+noroms-0ubuntu4.4


  Guest: Ubuntu Lucid x86_64 server

Steps:
 1. run "virt-manager",
 2. start a guest,
 3. click "Save" in "Virtual Machine" menu, and wait a progress dialog done,
 4. click "Restore" in "Virtual Machine" menu
Expect result:
 VM restored
Actually:
 Show a error dialog with following information:

Error restoring domain: operation failed: could not query memory balloon
allocation

Traceback (most recent call last):
  File "/usr/share/virt-manager/virtManager/asyncjob.py", line 45, in cb_wrapper
    callback(asyncjob, *args, **kwargs)
  File "/usr/share/virt-manager/virtManager/engine.py", line 956, in asyncfunc
    vm.startup()
  File "/usr/share/virt-manager/virtManager/domain.py", line 1049, in startup
    self._update_status()
  File "/usr/share/virt-manager/virtManager/domain.py", line 1274, in _update_status
    info = self.get_info()
  File "/usr/share/virt-manager/virtManager/domain.py", line 967, in get_info
    return self._backend.info()
  File "/usr/lib/python2.7/dist-packages/libvirt.py", line 823, in info
    if ret is None: raise libvirtError ('virDomainGetInfo() failed', dom=self)
libvirtError: operation failed: could not query memory balloon allocation

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https://bugs.launchpad.net/bugs/411417

Title:
  virsh restore causes kernel panic in guest.

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