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  size_t k;
+ // force touching of each page despite the optimizer
  volatile char c = 0;
That patch reminds me of a piece of trivia I'd like to share: Ending with a colon a comment that goes before the code that it comments is a subtle device to make that more obvious: 


  size_t k;
+ // force touching of each page despite the optimizer:
  volatile char c = 0;


Stephan

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