[Bug 716528] Re: kvm 100% when performing apparently IO operations

[Serge Hallyn]

All right, so this comes down to an incompatibility between maverick's
versions of libvirt and qemu - libvirt is using QED, but qemu-kvm
doesn't yet know about it.  The '-drive file=X,if=none device=...'
format, in particular, is QED.

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https://bugs.launchpad.net/bugs/716528

Title:
  kvm 100% when performing apparently IO operations