> >Yes.  I spent quite a while cursing while I hacked on my test program
 > >to make sendfile do zero-copy.   Thank goodness Solaris is open
 > >source, else it might have taken me much longer to figure out.
 >
 > Yes It's so easy to  make sure that your application works properly when 
 > you have access to the kernel code.

It's also easy to tie your application to implementation artifacts which
will cause it to break during the next patch cycle.

The fact that examining source is necessary in order to expected
performance benefits from sendfile() means we have not properly
documented it.  Going further, my opinion is that *any* time one
needs access to the source in order to properly use a public
interface, a high-priority documentation bug needs to be filed.

-- 
meem
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