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SubjectMemory-mapped I/O barriers, state of affairs?
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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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