Re: [PATCH 6/9] readahead: add /debug/readahead/stats

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>   This looks all inherently racy (which doesn't matter much as you suggest)
> so I just wanted to suggest that if you used per-cpu counters you'd get
> race-free and faster code at the cost of larger data structures and using
> percpu_counter_add() instead of ++ (which doesn't seem like a big
> complication to me).

No problem. I'll switch to per-cpu counters in next post.

Thanks,
Fengguang
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