Re: [Qemu-devel] [RFC v6 18/27] monitor: send event when command queue full

[Fam Zheng]

On Tue, 12/19 16:45, Peter Xu wrote:
> Set maximum QMP command queue length to 8.  If queue full, instead of
> queue the command, we directly return a "command-dropped" event, telling
> client that specific command is dropped.
> 
> Note that this flow control mechanism is only valid if OOB is enabled.
> If it's not, the effective queue length will always be 1, which strictly
> follows original behavior of QMP command handling (which never drop
> messages).
> 
> Signed-off-by: Peter Xu <address@hidden>
> ---
>  monitor.c | 17 ++++++++++++++++-
>  1 file changed, 16 insertions(+), 1 deletion(-)
> 
> diff --git a/monitor.c b/monitor.c
> index ed9a741d06..b571866659 100644
> --- a/monitor.c
> +++ b/monitor.c
> @@ -4038,6 +4038,8 @@ static void monitor_qmp_bh_dispatcher(void *data)
>      }
>  }
>  
> +#define  QMP_REQ_QUEUE_LEN_MAX  (8)

Is this limit introspectable on QMP?

Fam