migration: Only go to the iterate stage if there is anything to send
Signed-off-by: Orit Wasserman <[email protected]>
Signed-off-by: Juan Quintela <[email protected]>
Reviewed-by: Reviewed-by: Eric Blake <[email protected]>
Reviewed-by: Paolo Bonzini <[email protected]>
diff --git a/migration.c b/migration.c
index 6d3aeed..fe1a103 100644
--- a/migration.c
+++ b/migration.c
@@ -698,7 +698,7 @@
DPRINTF("iterate\n");
pending_size = qemu_savevm_state_pending(s->file, max_size);
DPRINTF("pending size %lu max %lu\n", pending_size, max_size);
- if (pending_size >= max_size) {
+ if (pending_size && pending_size >= max_size) {
ret = qemu_savevm_state_iterate(s->file);
if (ret < 0) {
qemu_mutex_unlock_iothread();
