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SubjectRE: O_DIRECT question
> The other problem besides the inability to handle IO errors is that
> mmap()+msync() is synchronous. You need to go async to keep
> the pipelines full.

msync(addr, len, MS_ASYNC); doesn't do what you want?

> Now if someone wants to implement an aio version of msync and
> mlock, that might do the trick. At least for MMU systems.
> Non MMU systems just can't play mmap type games.

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