diff --git a/src/core/lib/surface/call.c b/src/core/lib/surface/call.c
index 966d89451d9..87787b3eea7 100644
--- a/src/core/lib/surface/call.c
+++ b/src/core/lib/surface/call.c
@@ -119,7 +119,11 @@ typedef struct batch_control {
   grpc_call *call;
   /* Share memory for cq_completion and notify_tag as they are never needed
      simultaneously. Each byte used in this data structure count as six bytes
-     per call, so any savings we can make are worthwhile */
+     per call, so any savings we can make are worthwhile,
+
+     We use notify_tag to determine whether or not to send notification to the
+     completion queue. Once we've made that determination, we can reuse the
+     memory for cq_completion. */
   union {
     grpc_cq_completion cq_completion;
     struct {
diff --git a/src/cpp/common/channel_filter.cc b/src/cpp/common/channel_filter.cc
index 253614ca9b4..a7b3c2c0dac 100644
--- a/src/cpp/common/channel_filter.cc
+++ b/src/cpp/common/channel_filter.cc
@@ -69,9 +69,9 @@ void ChannelData::GetInfo(grpc_exec_ctx *exec_ctx, grpc_channel_element *elem,
 
 // CallData
 
-void CallData::StartTransportStreamOp(grpc_exec_ctx *exec_ctx,
-                                      grpc_call_element *elem,
-                                      TransportStreamOp *op) {
+void CallData::StartTransportStreamOpBatch(grpc_exec_ctx *exec_ctx,
+                                           grpc_call_element *elem,
+                                           TransportStreamOpBatch *op) {
   grpc_call_next_op(exec_ctx, elem, op->op());
 }
 
diff --git a/src/cpp/common/channel_filter.h b/src/cpp/common/channel_filter.h
index 726e5abf8d3..8d800b87d9a 100644
--- a/src/cpp/common/channel_filter.h
+++ b/src/cpp/common/channel_filter.h
@@ -141,12 +141,12 @@ class TransportOp {
 };
 
 /// A C++ wrapper for the \c grpc_transport_stream_op_batch struct.
-class TransportStreamOp {
+class TransportStreamOpBatch {
  public:
   /// Borrows a pointer to \a op, but does NOT take ownership.
   /// The caller must ensure that \a op continues to exist for as
-  /// long as the TransportStreamOp object does.
-  explicit TransportStreamOp(grpc_transport_stream_op_batch *op)
+  /// long as the TransportStreamOpBatch object does.
+  explicit TransportStreamOpBatch(grpc_transport_stream_op_batch *op)
       : op_(op),
         send_initial_metadata_(
             op->send_initial_metadata
@@ -257,9 +257,9 @@ class CallData {
   // TODO(roth): Find a way to avoid passing elem into these methods.
 
   /// Starts a new stream operation.
-  virtual void StartTransportStreamOp(grpc_exec_ctx *exec_ctx,
-                                      grpc_call_element *elem,
-                                      TransportStreamOp *op);
+  virtual void StartTransportStreamOpBatch(grpc_exec_ctx *exec_ctx,
+                                           grpc_call_element *elem,
+                                           TransportStreamOpBatch *op);
 
   /// Sets a pollset or pollset set.
   virtual void SetPollsetOrPollsetSet(grpc_exec_ctx *exec_ctx,
@@ -329,12 +329,12 @@ class ChannelFilter final {
     reinterpret_cast<CallDataType *>(elem->call_data)->~CallDataType();
   }
 
-  static void StartTransportStreamOp(grpc_exec_ctx *exec_ctx,
-                                     grpc_call_element *elem,
-                                     grpc_transport_stream_op_batch *op) {
+  static void StartTransportStreamOpBatch(grpc_exec_ctx *exec_ctx,
+                                          grpc_call_element *elem,
+                                          grpc_transport_stream_op_batch *op) {
     CallDataType *call_data = (CallDataType *)elem->call_data;
-    TransportStreamOp op_wrapper(op);
-    call_data->StartTransportStreamOp(exec_ctx, elem, &op_wrapper);
+    TransportStreamOpBatch op_wrapper(op);
+    call_data->StartTransportStreamOpBatch(exec_ctx, elem, &op_wrapper);
   }
 
   static void SetPollsetOrPollsetSet(grpc_exec_ctx *exec_ctx,
@@ -386,7 +386,7 @@ void RegisterChannelFilter(
       stack_type,
       priority,
       include_filter,
-      {FilterType::StartTransportStreamOp, FilterType::StartTransportOp,
+      {FilterType::StartTransportStreamOpBatch, FilterType::StartTransportOp,
        FilterType::call_data_size, FilterType::InitCallElement,
        FilterType::SetPollsetOrPollsetSet, FilterType::DestroyCallElement,
        FilterType::channel_data_size, FilterType::InitChannelElement,
diff --git a/test/cpp/end2end/filter_end2end_test.cc b/test/cpp/end2end/filter_end2end_test.cc
index bd384f68b40..2f873eeaa8e 100644
--- a/test/cpp/end2end/filter_end2end_test.cc
+++ b/test/cpp/end2end/filter_end2end_test.cc
@@ -122,8 +122,9 @@ class ChannelDataImpl : public ChannelData {
 
 class CallDataImpl : public CallData {
  public:
-  void StartTransportStreamOp(grpc_exec_ctx* exec_ctx, grpc_call_element* elem,
-                              TransportStreamOp* op) override {
+  void StartTransportStreamOpBatch(grpc_exec_ctx* exec_ctx,
+                                   grpc_call_element* elem,
+                                   TransportStreamOpBatch* op) override {
     // Incrementing the counter could be done from Init(), but we want
     // to test that the individual methods are actually called correctly.
     if (op->recv_initial_metadata() != nullptr) IncrementCallCounter();