K 10
svn:author
V 5
andre
K 8
svn:date
V 27
2013-10-22T13:45:03.462235Z
K 7
svn:log
V 781
Add gross proof of concept hack to bypass the entire lower stack
for outbound tcp sends for certain very high performance uses.

Bypassing means packets going directly to the wire and skip over
all firewalls or other processing done in ip_output() and
ether_output().

This very first version only does one interface and MAC address
lookup at the beginning of a connection.  It doesn't detect any
changes afterwards and will grind into a void if it has to.  On
certain errors it also leaks a bit of memory.

The point of this patch is to allow for performance analysis of
a) the normal vs. bypass path; b) to profile and optimize the
normal path to bring it as close as possible to the bypass path.

This patch is not intended to be merged to HEAD in its current
form (or at all).

END