Implementing paging optimization to avoid populate on page fault during an IO read
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United States of America Patent
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Sep 20, 2016
Grant Date -
Jul 21, 2016
app pub date -
Apr 25, 2015
filing date -
Jan 16, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
A method and system for implementing paging optimization to avoid populate on page fault during an Input Output (IO) read. A size of the IO read is evaluated. If the IO does not entirely cover a page, then the page is paged in. If the IO entirely covers one or more pages, those pages are not paged in. Page attributes may be different during the IO read. Pages that are paged in are marked readable and writable but pages that are waiting for the IO to populate them are only marked writeable. Once the IO read has completed, the pages are marked readable and writable and all outstanding faults due to reads during this window are completed.
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