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.
圖像加註文字，張又俠是中共二十大政治局中兩位超齡被留任的高官之一，被認為得到了習近平的高度新任。2026年1月27日最近更新： 2026年1月28日
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Monthly NHS payments to Crawford escalated soon after it began the assessment work for the VDPS, BBC analysis shows.