Re: [Qemu-devel] [PATCH] dataplane: fix hang introduced by AioContext transition

[Stefan Hajnoczi]

On Wed, Mar 13, 2013 at 03:14:15PM +0100, Paolo Bonzini wrote:
> The bug is that the EventNotifiers do have a NULL io_flush callback.
> Because _none_ of the callbacks on the dataplane AioContext have such a
> callback, aio_poll will simply do nothing.  Fixed by adding the callbacks:
> the ioeventfd will always be polled (this can change in the future to
> pause/resume the processing during live snapshots or similar operations);
> the ioqueue will be polled if there are outstanding requests.
> 
> I must admit I have screwed up my testing somehow, because commit
> 2c20e71 does not work even if cherry-picked on top of 1.4.0, and this
> patch fixes it there as well.
> 
> Signed-off-by: Paolo Bonzini <address@hidden>
> ---
>  hw/dataplane/virtio-blk.c | 17 +++++++++++++++--
>  1 file changed, 15 insertions(+), 2 deletions(-)

Thanks, tested and applied to my block tree:
https://github.com/stefanha/qemu/commits/block

Stefan