Johannes Schindelin, Sat, Oct 08, 2005 20:27:06 +0200:
quoted text
> > I really think that you should just get rid of the mmap.
> > 
> > As it is, you're just slowing the code down on sane architectures. That's 
> > not good.
> > 
> > So I'd suggest something like this instead.
> > 
> > Totally untested, of course.
> 
> Am I missing something? I don't see where the changes are written back to 
> the fd. After all, mmap() is called with PROT_WRITE...

It's just becase the file is open for reading only.
Also, it is not an mmap/unmap implementation. Just reading cache in.

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