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cdb711e42b
The ->used counter is one of the most stressed, and it heavily depends on the ->allocated one, so let's first move ->allocated to a few buckets. A function "pool_allocated()" was added to return the sum of the entries. It's important not to abuse it as it does iterate, so everywhere it's possible to avoid it by keeping a local counter, it's better. Currently it's used for limited pools which need to make sure they do not allocate too many objects. That's an acceptable tradeoff to save CPU on large machines at the expense of spending a little bit more on small ones which normally are not under load.