Re: [Qemu-devel] [PATCH 0/2] dataplane: fix start/stop races

[Christian Borntraeger]

On 03/29/2016 03:42 PM, Michael S. Tsirkin wrote:
> This works around races that data plane introduces
> simply by exiting immediately if we detect
> that dataplane is active.
> 
> It's a small but ugly patch, it's only justification
> is that it's minimally intrusive, and that it clearly
> has no chance to break non data plane users.
> 
> The idea is to rework it all post 2.6.
> 
> Michael S. Tsirkin (2):
>   virtio: add aio handler
>   virtio-blk: use aio handler for data plane
>  
>  include/hw/virtio/virtio-blk.h  |  2 ++
>  include/hw/virtio/virtio.h      |  4 ++++
>  hw/block/dataplane/virtio-blk.c | 13 +++++++++++++
>  hw/block/virtio-blk.c           | 28 ++++++++++++++++++----------
>  hw/virtio/virtio.c              | 36 ++++++++++++++++++++++++++++++++----
>  5 files changed, 69 insertions(+), 14 deletions(-)
> 

This also seems to help on my setup.Tu Bo, would be good if you
can double check this patch set as well on your setup?

Christian