On Fri, Feb 25, 2011 at 11:51, Tom Herbert [off-list ref] wrote:

quoted

Tom, Bill: do you have a timeline for merging this? Especially the
UDP bits?

Bill has been working on the TCP implementation which is requiring
some fairly major surgery on the listener connections in syn-rcvd
state, this is ongoing.

Yup.  The broad approach I settled on is to delay binding of new
connections to listener sockets by moving receive_sock's from a
per-listen_sock hash table to new hash chains in the global hash
table.

This is very much a work-in-progress.  I'm part way through the
conversion and have running code with most of the new structures in
place in parallel with the old; I'm about to start relying exclusively
on the new, and then will tear down the old; once that's done I'll be
in a position to hook that up to SO_REUSEPORT and start actually
measuring the difference.  In short: it will be a while.

So splitting SO_REUSEPORT for UDP from SO_REUSEPORT for TCP makes a
lot of sense to me.