tcp fast open?

Yuchung Cheng ycheng at
Fri Feb 17 10:24:32 EST 2012

On Fri, Feb 17, 2012 at 6:38 AM, Dave Taht <dave.taht at> wrote:
> I am curious if working code exists for tcp fast open for Linux as yet?
> I just finished slamming an implementation of tcp-ledbat v9 into
> cerowrt (untested as yet, ledbat vs sfqred
> will be interesting), and based on the presentation at the last linux
> plumbers conference, tcp fast open looked interesting too.
Hi Dave,

At this moment, we do have a working patch under testing it
internally. The handshake code is the most complicated and critical
piece in TCP. One important test is the fail over if routers drop or
act weirdly on SYN/SYN-ACK with payload and/or experimental TCP
options. If things go well we will upstream it to Linux netdev in
April and I'll CC you.

Btw, I am very interested in learning the result of AQM vs
delayed-based CC like ledbat.



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