This is exactly what the get_user_pages() family of functions provides. These functions lookup physical memory frames that back a given virtual address range by walking the page tables. They also handle access validation and non-present pages.
Audio works the same way — PCM samples go into an audio_frames table and come out the other side via replication.
（本报记者亓玉昆、刘博通、杨迅、秦瑞杰、刘新吾、李君强、李纵、范昊天参与采写），更多细节参见新收录的资料
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I think it’s important to work through this calmly, to understand the intelligence and the briefings that the government has to get to this juncture … If you’re going to send Australian personnel to a conflict, that is one of the most important decisions any government would make. And I think it’s better that there’s bipartisan support, and that’s why you want to be constructive with the government …。业内人士推荐新收录的资料作为进阶阅读