migration: Make postcopy listen thread joinable

This patch makes the listen thread joinable instead detached, and joins
it alongside other postcopy threads.

Signed-off-by: Juraj Marcin <jmarcin@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Link: https://lore.kernel.org/r/20251103183301.3840862-8-jmarcin@redhat.com
Signed-off-by: Peter Xu <peterx@redhat.com>

diff --git a/migration/postcopy-ram.c b/migration/postcopy-ram.c
index 91431f02a4c078d254af02c2caa8ea30d4b8004a..8405cce7b4575a3c8bc57e24b06862b572c1c691 100644 (file)
--- a/migration/postcopy-ram.c
+++ b/migration/postcopy-ram.c
@@ -2181,7 +2181,6 @@ static void *postcopy_listen_thread(void *opaque)
 
 out:
     rcu_unregister_thread();
-    mis->have_listen_thread = false;
     postcopy_state_set(POSTCOPY_INCOMING_END);
 
     migration_bh_schedule(postcopy_listen_thread_bh, NULL);
@@ -2215,7 +2214,7 @@ int postcopy_incoming_setup(MigrationIncomingState *mis, Error **errp)
     mis->have_listen_thread = true;
     postcopy_thread_create(mis, &mis->listen_thread,
                            MIGRATION_THREAD_DST_LISTEN,
-                           postcopy_listen_thread, QEMU_THREAD_DETACHED);
+                           postcopy_listen_thread, QEMU_THREAD_JOINABLE);
 
     return 0;
 }
@@ -2224,6 +2223,11 @@ int postcopy_incoming_cleanup(MigrationIncomingState *mis)
 {
     int rc = 0;
 
+    if (mis->have_listen_thread) {
+        qemu_thread_join(&mis->listen_thread);
+        mis->have_listen_thread = false;
+    }
+
     if (migrate_postcopy_ram()) {
         rc = postcopy_ram_incoming_cleanup(mis);
     }