Messages in this thread | | | Date | Mon, 22 Mar 2010 20:18:49 +0100 | Subject | Memory-mapped I/O barriers, state of affairs? | From | Leon Woestenberg <> |
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Hello,
searching for good info on device IO racing against host memory writes I came upon this 2006 article:
http://lwn.net/Articles/198988/
"there is no guaranteed ordering between writes to regular memory and writes to a memory-mapped I/O range. "
What is the current solution for that particular problem, i.e. how should I make sure host memory writes are committed before I have an external DMA device act on it?
Thanks, -- Leon Woestenberg.
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