Dear Subscribers, As most of you will already know, one can use get_user_pages to get a struct pages list of a certain user space buffer. While doing this, get_user_pages also locks the pages into physical mem (preventing them from being swapped out to disk, or moved within phys mem) for usage with e.g. DMA. Now here's my question: what happens if you call get_user_pages twice on the same buffer ? Will it keep track of how many times a page has been locked ? Meaning if I locked the same buffer "twice", will it still be locked when I unlock it once (using page_cache_release) ? Regards, Tom
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