any particular reason to downvote this? (noticed that the other mention of semaphore got downvoted too). It would be nice to know why. I'm relatively new to HN,

any particular reason to downvote this? (noticed that the other mention of semaphore got downvoted too). It would be nice to know why. I'm relatively new to HN, but haven't had much stuff downvoted, and not sure what might be wrong with my comment.