[ -arch and -current BCC'ed for wider coverage, please direct followups to
-net and/or me ]

I have put a new copy of the zero copy sockets and NFS patches, against
-current as of early November 14th, 2000, here:


Questions, comments and feedback are welcome.

Besides being generated against a newer version of -current, the following
things have changed in the new patches posted above:

 - The "localhost panic" problem has hopefully been fixed.  The fix was
   to avoid page-flipping pages with a wire count greater than 0.  I
   believe this is the right fix, but I would welcome feedback from
   someone more familiar with the VM system.

 - The new external mbuf code has been integrated.

As of this release, there are no known problems with the code.  If anyone
wants to challenge that, I'll gladly accept bug reports, code comments,
etc. :)

For those of you who missed the previous messages about this code (that went
out to -net, -arch and -current), here's a quick list of what is included
in the code:

 - Zero copy send and receive code, written by Drew Gallatin

 - Zero copy NFS code, written by Drew Gallatin.

 - Header splitting firmware for Alteon's Tigon II boards (written by me),
   based on version 12.4.11 of their firmware.  This is used in combination
   with the zero copy receive code to guarantee that the payload of TCP or
   UDP packet is placed into a page-aligned buffer.

 - Alteon firmware debugging ioctls and supporting routines for the Tigon
   driver (also written by me).  This will help anyone who is doing
   firmware development under FreeBSD for the Tigon boards.

The Alteon header splitting and debugging code was written for Pluto
Technologies (www.plutotech.com), which kindly agreed to let me release
the code.

Kenneth Merry

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