The A/D bits exist entirely for the operating system's benefit. The Accessed bit tells the OS which pages have been recently used, enabling page replacement algorithms to choose pages to evict when memory runs low. The Dirty bit tells the OS which pages have been modified and must be written back to disk before eviction; clean pages can simply be discarded and re-read from disk later.
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第一百一十三条 治安案件调查结束后，公安机关应当根据不同情况，分别作出以下处理：
Web streams do provide clear mechanisms for tuning backpressure behavior in the form of the highWaterMark option and customizable size calculations, but these are just as easy to ignore as desiredSize, and many applications simply fail to pay attention to them.，详情可参考51吃瓜
numbers are sometimes later products but not always; some prefixes mean specific
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