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Date:      Thu, 18 Oct 2007 23:32:13 -0400 (EDT)
From:      "Jonathan Noack" <noackjr@alumni.rice.edu>
To:        net@freebsd.org
Subject:   accept filters and zero copy sockets
Message-ID:  <15756.67.45.62.107.1192764733.squirrel@www.noacks.org>

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I'm in the process of upgrading my web/database/nfs/jack-of-all-trades box
from 6.2 to RELENG_7.  I figured now would be a good time to clean up my
kernel config files.  I have the following in my old kernel config:

# Statically Link in accept filters
options       ACCEPT_FILTER_DATA
options       ACCEPT_FILTER_HTTP

# Zero copy sockets support.  This enables "zero copy" for sending and
# receiving data via a socket.  The send side works for any type of NIC,
# the receive side only works for NICs that support MTUs greater than the
# page size of your architecture and that support header splitting.  See
# zero_copy(9) for more details.
options       ZERO_COPY_SOCKETS

Are these options still working/recommended?  With all the changes to
networking over the years (this box was originally set up during the 4.x
days and has been upgraded many times) I have no idea if these are still
good things to have.

Thanks!
-Jon




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