On Thu, May 11, 2017 at 04:41:59PM +0200, Paolo Bonzini wrote:
> Another possibility is to use tg->lock, which we're holding anyway in
> both schedule_next_request and throttle_group_co_io_limits_intercept.
> This would require open-coding the CoQueue however, so I've chosen this
> alternative.
> 
> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
> ---
>         v1->v2: rename CoMutex [Fam]
> 
>  block/block-backend.c          |  1 +
>  block/throttle-groups.c        | 12 ++++++++++--
>  include/sysemu/block-backend.h |  7 ++-----
>  3 files changed, 13 insertions(+), 7 deletions(-)

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>