Re: [Qemu-devel] qemu : rbd block driver internal snapshot and vm_stop is hanging forever

[Denis V. Lunev]

On 11/09/2015 10:19 AM, Denis V. Lunev wrote:
> On 11/09/2015 06:10 AM, Alexandre DERUMIER wrote:
> > Hi,
> >
> > with qemu (2.4.1), if I do an internal snapshot of an rbd device,
> > then I pause the vm with vm_stop,
> >
> > the qemu process is hanging forever
> >
> >
> > monitor commands to reproduce:
> >
> >
> > # snapshot_blkdev_internal drive-virtio0 yoursnapname
> > # stop
> >
> >
> >
> >
> > I don't see this with qcow2 or sheepdog block driver for example.
> >
> >
> > Regards,
> >
> > Alexandre
> this could look like the problem I have recenty trying to
> fix with dataplane enabled. Patch series is named as
>
> [PATCH for 2.5 v6 0/10] dataplane snapshot fixes
>
> Den

anyway, even if above will not help, can you collect gdb
traces from all threads in QEMU process. May be I'll be
able to give a hit.

Den