Re: [Qemu-devel] [PULL 10/40] migration: Delay start of migration main routines

[Kevin Wolf <kwolf@redhat.com>]

Am 16.05.2018 um 01:39 hat Juan Quintela geschrieben:
> We need to make sure that we have started all the multifd threads.
> 
> Signed-off-by: Juan Quintela <quintela@redhat.com>
> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>

This commit makes qemu-iotests 091 hang for me. Either it breaks
backward compatibility intentionally and we need to update the test
case, or there is a bug somewhere.

Can you have a look, please?

Kevin

> ---
>  migration/migration.c | 4 ++--
>  migration/migration.h | 1 +
>  migration/ram.c       | 3 +++
>  migration/socket.c    | 4 ++++
>  4 files changed, 10 insertions(+), 2 deletions(-)
> 
> diff --git a/migration/migration.c b/migration/migration.c
> index 8e5b421b97..61c4ee7850 100644
> --- a/migration/migration.c
> +++ b/migration/migration.c
> @@ -430,7 +430,7 @@ static void migration_incoming_setup(QEMUFile *f)
>      qemu_file_set_blocking(f, false);
>  }
>  
> -static void migration_incoming_process(void)
> +void migration_incoming_process(void)
>  {
>      Coroutine *co = qemu_coroutine_create(process_incoming_migration_co, NULL);
>      qemu_coroutine_enter(co);
> @@ -448,7 +448,7 @@ void migration_ioc_process_incoming(QIOChannel *ioc)
>  
>      if (!mis->from_src_file) {
>          QEMUFile *f = qemu_fopen_channel_input(ioc);
> -        migration_fd_process_incoming(f);
> +        migration_incoming_setup(f);
>          return;
>      }
>      multifd_recv_new_channel(ioc);
> diff --git a/migration/migration.h b/migration/migration.h
> index 7c69598c54..26e5951d56 100644
> --- a/migration/migration.h
> +++ b/migration/migration.h
> @@ -200,6 +200,7 @@ void migrate_set_state(int *state, int old_state, int new_state);
>  
>  void migration_fd_process_incoming(QEMUFile *f);
>  void migration_ioc_process_incoming(QIOChannel *ioc);
> +void migration_incoming_process(void);
>  
>  bool  migration_has_all_channels(void);
>  
> diff --git a/migration/ram.c b/migration/ram.c
> index 87434d3fce..f7e8615e15 100644
> --- a/migration/ram.c
> +++ b/migration/ram.c
> @@ -717,6 +717,9 @@ void multifd_recv_new_channel(QIOChannel *ioc)
>      qemu_thread_create(&p->thread, p->name, multifd_recv_thread, p,
>                         QEMU_THREAD_JOINABLE);
>      atomic_inc(&multifd_recv_state->count);
> +    if (multifd_recv_state->count == migrate_multifd_channels()) {
> +        migration_incoming_process();
> +    }
>  }
>  
>  /**
> diff --git a/migration/socket.c b/migration/socket.c
> index e09fd1aae5..7a5eb562b8 100644
> --- a/migration/socket.c
> +++ b/migration/socket.c
> @@ -170,6 +170,10 @@ static void socket_accept_incoming_migration(QIONetListener *listener,
>          qio_net_listener_disconnect(listener);
>  
>          object_unref(OBJECT(listener));
> +
> +        if (!migrate_use_multifd()) {
> +            migration_incoming_process();
> +        }
>      }
>  }
>  
> -- 
> 2.17.0
> 
>