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

[Juan Quintela <quintela@redhat.com>]

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>
---
 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