migration: Only go to the iterate stage if there is anything to send
Signed-off-by: Orit Wasserman <owasserm@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com> Reviewed-by: Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
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@ -698,7 +698,7 @@ static void *buffered_file_thread(void *opaque)
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DPRINTF("iterate\n");
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pending_size = qemu_savevm_state_pending(s->file, max_size);
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DPRINTF("pending size %lu max %lu\n", pending_size, max_size);
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if (pending_size >= max_size) {
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if (pending_size && pending_size >= max_size) {
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ret = qemu_savevm_state_iterate(s->file);
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if (ret < 0) {
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qemu_mutex_unlock_iothread();
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