Re: [Qemu-devel] qemu 2.0, deadlock in block-commit

[Stefan Hajnoczi]

On Fri, May 23, 2014 at 06:25:31PM +0200, Marcin Gibuła wrote:
> >If you see a pending request on a RADOS block device (rbd) then it would
> >be good to dig deeper into QEMU's block/rbd.c driver to see why it's not
> >completing that request.
> >
> >Are you using qcow2 on top of rbd?
> 
> Hi,
> I've already recreated this without rbd and with stock qemu 2.0.

Two options for making progress on this bug:

1. Debug bdrv_drain_all() and find out whether there are any I/O
   requests remaining.

2. Post steps for reproducing this problem (exact command-lines or virsh
   commands used).

Stefan