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.
The couple met by chance when they were on separate walks along the South West Coast Path in 2011, and ended up married three years later.
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Гангстер одним ударом расправился с туристом в Таиланде и попал на видео18:08。关于这个话题，旺商聊官方下载提供了深入分析