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A comment on `three = 1` in the linux sourcecode. Parent comment

Re:`three = 1` in the linux sourcecode by peteretep on Tuesday February 25, 2014 @05:10AM (#7296692)
there are three hard things concurrency, in computer science: cache invalidation, naming things, and off-by-one errors
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Re:`three = 1` in the linux sourcecode by jph on Tuesday February 25, 2014 @05:52AM (#7296832)
what's the name for the four hard things concurrency, in computer science: cache invalidation, off-by-one errors, naming things, and whatever the last one is called?
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