sendfile(2) SF_NOPUSH flag proposal

[Terry Lambert]

Igor Sysoev wrote:
> When there's the simple way to avoid the partially filled packets
> I do not see any reason not to use it.

So set a flag when you would have called tcp_output() in
between the headers and file data, or the file data and the
trailers, and, if you have to early return, and the flag
is set, call it before your early return.  Problem solved.

-- Terry