Re: [Qemu-devel] [PATCH] migration: notify runstate immediately before vcpu stops

[Peter Xu]

On Tue, Jul 16, 2019 at 03:10:42PM +0800, Yan Zhao wrote:
> for some devices to do live migration, it is needed to do something
> immediately before vcpu stops. add a notification here.

Hi, Yan,

Could I ask for a more detailed commit message here?  E.g., what is
"some devices"?  And, what's the problem behind?

Thanks,

> 
> Signed-off-by: Yan Zhao <address@hidden>
> ---
>  cpus.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/cpus.c b/cpus.c
> index b09b702..d5d4abe 100644
> --- a/cpus.c
> +++ b/cpus.c
> @@ -1068,6 +1068,7 @@ static int do_vm_stop(RunState state, bool send_stop)
>      int ret = 0;
>  
>      if (runstate_is_running()) {
> +        vm_state_notify(1, state);
>          cpu_disable_ticks();
>          pause_all_vcpus();
>          runstate_set(state);
> -- 
> 2.7.4
> 
> 

-- 
Peter Xu