From owner-freebsd-current  Thu Nov  2 21:20:32 2000
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Date: Thu, 2 Nov 2000 22:20:19 -0700
From: "Kenneth D. Merry" <ken@kdm.org>
To: net@FreeBSD.org
Subject: new zero copy sockets and NFS snapshot
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[ -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 October 30th, 2000, here:

http://people.FreeBSD.ORG/~ken/zero_copy/

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:

 - Robert Picco's zero copy send code has been removed.  It was
   never fixed to eliminate a data corruption problem, and it is
   likely that Drew Gallatin's code will make it into -current
   instead.

 - Bring the major number used in the ti(4) driver in line with
   the one we have reserved in sys/conf/majors.

 - Make sure calls to ti_hdr_split() are only made inside #ifdef
   TI_JUMBO_HDRSPLIT.

 - Convert the non-stock portions of the ti(4) driver from spls to
   mutexes.

 - Get rid of an extra make_dev(), and make sure the one in
   ti_attach() comes before we return.

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
   <gallatin@FreeBSD.ORG>.

 - 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.

Ken
-- 
Kenneth Merry
ken@kdm.org


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