From: Lucas Meneghel Rodrigues <lmr@redhat.com>
Subject: qemu.git/qemu-kvm.git bugs during migrate + reboot
Date: Thu, 20 Sep 2012 13:51:45 -0300
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Hi guys,

We're seeing the following problem during upstream testing:

qemu: VQ 0 size 0x80 Guest index 0x2d6
     inconsistent with Host index 0x18: delta 0x2be
     qemu: warning:  error while loading state for
     instance 0x0 of device '0000:00:04.0/virtio-blk'
     load of migration failed

This is happening consistently with qemu and qemu-kvm. Test case is 
simple, while the vm goes through a reboot loop, a parallel ping-pong 
migration loop happens.

I'm happy to provide more details and logs.

Lucas