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

[Fam Zheng]

On Wed, 04/18 15:42, David Lee wrote:
> 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, I can reproduce this but not on master. I will take a look.

Fam