On 2017-11-29 19:51, Max Reitz wrote:
> 102 truncates a qcow2 file (the raw file) on purpose while a VM is
> running.  However, image locking will usually prevent exactly this.
> 
> The fact that most people have not noticed until now (I suppose you may
> have seen sporadic failures, but not taken them too seriously, like me)
> further shows that this truncation is actually not really done
> concurrently, but that the VM is still starting up by this point and has
> not yet opened the image.  Remedy this by waiting for the monitor shell
> to appear before the qemu-img invocation so we know the VM is up.
> 
> Signed-off-by: Max Reitz <[email protected]>
> ---
>  tests/qemu-iotests/102     | 7 ++++++-
>  tests/qemu-iotests/102.out | 3 ++-
>  2 files changed, 8 insertions(+), 2 deletions(-)

Applied to my block branch.

Max

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