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.
"It is important that the taskforce is established as soon as possible," said Welsh, "because without it we don't have that driving force [and] those big, bold policies."
，详情可参考91视频
在云南，教育的阳光照亮山里娃的追梦路。“从‘有学上’到‘上好学’，我们像抓脱贫攻坚一样抓基础教育。”省教育厅相关负责人介绍。3种优质资源辐射方式覆盖学校、学生比例分别达到54.51%和68.63%。
$1,299 $727 (44% off) Niu
СюжетВзрыв в Москве