On 11.04.2017 16:50, Max Reitz wrote:
> In case of block migration, there may be writes to BlockBackends that do
> not have the write permission taken. Before this issue is fixed (which
> is not going to happen in 2.9), we therefore cannot assert that this is
> the case.
> 
> Suggested-by: Kevin Wolf <kwolf@redhat.com>
> Signed-off-by: Max Reitz <mreitz@redhat.com>
> ---
>  block.c    |  6 +++++-
>  block/io.c | 12 ++++++++++--
>  2 files changed, 15 insertions(+), 3 deletions(-)

I'll send a revert for 2.10 if/when this is merged.

Max