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From mallman <...@git.apache.org>
Subject [GitHub] spark pull request #16499: [SPARK-17204][CORE] Fix replicated off heap stora...
Date Tue, 21 Feb 2017 17:53:07 GMT
Github user mallman commented on a diff in the pull request:

    https://github.com/apache/spark/pull/16499#discussion_r102272981
  
    --- Diff: core/src/main/scala/org/apache/spark/storage/BlockManager.scala ---
    @@ -813,7 +813,14 @@ private[spark] class BlockManager(
                   false
               }
             } else {
    -          memoryStore.putBytes(blockId, size, level.memoryMode, () => bytes)
    +          val memoryMode = level.memoryMode
    +          memoryStore.putBytes(blockId, size, memoryMode, () => {
    +            if (memoryMode == MemoryMode.OFF_HEAP) {
    --- End diff --
    
    So do a copy if and only if `memoryMode == MemoryMode.OFF_HEAP` and `bytes` is not direct
and `bytes` is not a memory mapped file?


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