RE: O_DIRECT question

[Hua Zhong]

> 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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