migration/postcopy: Clear have_listen_thread

Clear have_listen_thread when we exit the thread.
The fallout from this was that various things thought there was
an ongoing postcopy after the postcopy had finished.

The case that failed was postcopy->savevm->loadvm.

This corresponds to RH bug https://bugzilla.redhat.com/show_bug.cgi?id=1608765

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Message-Id: <20180914170430.54271-2-dgilbert@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>

diff --git a/migration/savevm.c b/migration/savevm.c
index 9692577318737a4b8ffc4c09e62bf869472e7602..d35e87b88caa0656a7cacd43ec4151539baea7ad 100644 (file)
--- a/migration/savevm.c
+++ b/migration/savevm.c
@@ -1679,6 +1679,7 @@ static void *postcopy_ram_listen_thread(void *opaque)
     qemu_loadvm_state_cleanup();
 
     rcu_unregister_thread();
+    mis->have_listen_thread = false;
     return NULL;
 }