Re: [Qemu-discuss] qemu-img convert stuck

[David Lee]

On Thu, Apr 12, 2018 at 11:57 PM, David Lee <address@hidden> wrote:
>>>
>>> We tested qemu-kvm-ev-2.9.0-16.el7_4.14.1 - where from the source RPM we
>>> verified it does contain ef6dada8b44e1e7c4bec5c1115903af9af415b50
>>>
>>> But the issue still exists.  The convert got stuck if one of the old
>>> active overlay
>>> had been 'vol-resize'd  with qemu monitor command to a larger size.  This 
>>> looks
>>> like a prerequisite but not sufficient condition to trigger this badness.
>>
>> So it is a separate issue. Did you try upstream master as well?
>>
>> Fam
>
> Not yet.

Stefan & FAM,

Here are the steps to reproduce this issue reliably:

# qemu-img create -f qcow2 test.qcow2 100m
... omitted
# qemu-img create -F qcow2 -f qcow2 -b test.qcow2 overlay.qcow2
... omitted
# qemu-img resize overlay.qcow2 +20m
Image resized.
# qemu-img create -F qcow2 -f qcow2 -b overlay.qcow2 overlay2.qcow2
... omitted
# qemu-img convert overlay2.qcow2 -f qcow2 -O qcow2 combined.qcow2
[hang]


# qemu-img --version
qemu-img version 2.9.0(qemu-kvm-ev-2.9.0-16.el7_4.14.1)

-- 
Thanks,
Li Qun