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.
Then again, maybe it all really does go back to Tiggy-Touch-Wood. The truth is that we really do know shockingly little about the history of gesture.
。快连下载安装是该领域的重要参考
В России ответили на имитирующие высадку на Украине учения НАТО18:04，详情可参考旺商聊官方下载
Ben Jones accepts a certain amount of frustration is part and parcel of being a football fan. But that should be because of the action on the pitch, not because he can't use his mobile phone to call a friend in the stadium, or check the progress of other critical games.