roywei commented on issue #11544: [MXNET-620][WIP][Do not merge]Fix flaky test batchnorm training URL: https://github.com/apache/incubator-mxnet/pull/11544#issuecomment-402818788 - Updated conclusion. - Removed 'row_sparse' from stypes for the following reasons: 1. It's failing at testing varying [channel axis ](https://github.com/apache/incubator-mxnet/blob/e870890ab93ae25d51da01a445c965e4db71069b/tests/python/unittest/test_operator.py#L1524), this test already has rtol=0.2 and atol=0.01, we cant further increase rtol and atol. 2. row_sparse is never used and always fallback in this test, the logic is also tested tested at[ mkl/test_mkldnn.py](https://github.com/apache/incubator-mxnet/blob/e870890ab93ae25d51da01a445c965e4db71069b/tests/python/mkl/test_mkldnn.py#L218)
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