> > 1) The kernel copies data many times before it ends up in user
> > space.
> I'm very sorry, but you seem to be too late. This problem is
> (at least partially) fixed in the newer 2.3 kernels...
Hmm, I think 2.2 works just like 2.3 as far as reads go (I've just read
fs/read_write.c and mm/filemap.c for 2.2.10 and they seem to suggest this);
writing was the issue dealt with in the page cache overhaul IIRC.
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