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0c0fb93111
Before this change we used an overcomplicated method of memory reservations in the pool.RW which caused deadlocks. This changes it to use a much simpler reservation system where we actually reserve the memory and store it in the pool.RW. This allows us to use the semaphore.Weighted to count the actually memory in use (rather than the memory in use and in the cache). This in turn allows accurate use of the semaphore by users wanting memory.