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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Мощный удар Израиля по Ирану попал на видео09:41
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Kirk Jones, director of Bafta-winning film I Swear, has said John Davidson was "let down", after the Tourette's campaigner's racist slur was broadcast during the BBC's coverage of Sunday's ceremony.