zheng-da commented on a change in pull request #9862: Fix a race condition in 
converting data layouts in MKLDNN.
URL: https://github.com/apache/incubator-mxnet/pull/9862#discussion_r170130612
 
 

 ##########
 File path: src/ndarray/ndarray.cc
 ##########
 @@ -1017,6 +1017,7 @@ inline void CopyFromToDnsImpl(const NDArray& from, const 
NDArray& to, RunContext
     // with Copy().
     NDArray tmp_from = from;
     if (tmp_from.IsMKLDNNData()) {
+      // TODO(zhengda) tmp_from should be cached.
 
 Review comment:
   The reason I ask is that I saw TODO in many places in the code. Are all 
TODOs tracked in github issues? Or is this the new practice we want to push? 
And is github issue the best place for us to keep track of these TODOs? I 
remember Sheng has a script that closes issues if they aren't inactive for 30 
days or so.

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