mmap() and msync(..MS_INVALIDATE..) should work.
Stephan
>
> Ok so I have an application where I need to
> reread a file I have just written to ensure that it went to disk
> correctly..
>
> Other than reading a few GB of data, is there a way to flush
> out the cache copy of a file I've written?
>
> possibilities include:
>
> a file flag saying "don't keep a copy after it's written to disk"?
> a syscall discard_cached_blocks(fd);
>
>
> ?
> any other suggestions?
>
> julian
> (BTW this would be for 4.x initially)
>
>
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