On Fri, Jun 23, 2017 at 03:46:55PM +0300, Manos Pitsidianakis wrote:
> +    qemu_co_queue_init(&tgm->throttled_reqs[0]);
> +    qemu_co_queue_init(&tgm->throttled_reqs[1]);

Where is reqs_lock initialized?

It would be cleaner to move the throttled_reqs[] and reqs_lock
initialization into the tgm registration function.  That way it's done
in a single place.