Snap for 4818534 from b489e125a1987e95bba0374c97faac7c8d722e5c to pi-release

Change-Id: I1f30fbcabb5777f4d04e14d8e2ab620f8ff0efb8
diff --git a/common/vsoc/lib/socket_forward_region_view.cpp b/common/vsoc/lib/socket_forward_region_view.cpp
index 0282fd6..5c9c281 100644
--- a/common/vsoc/lib/socket_forward_region_view.cpp
+++ b/common/vsoc/lib/socket_forward_region_view.cpp
@@ -227,6 +227,7 @@
         LOG(DEBUG) << "acquired queue " << id
                    << ". current seq_num: " << data()->seq_num;
         ++data()->seq_num;
+        SendSignal(layout::Sides::Peer, &data()->seq_num);
         return id;
       }
       ++id;