From: Eric Dumazet <redacted>
Date: Wed, 29 Oct 2014 12:27:49 -0700

Yuchung and othres are working on a new way to handle reorders (RACK),
and should present the concept in next IETF meeting.

A linux patch should follow shortly.

High level idea is :

Decide when and what to retransmit based on the timing, instead of
sequence, relationships. This covers both original or retransmitted
packets.

On dupacks, wait a fraction of RTT before the repair process to both
allow reordering and relieve the network

My instint says that this delay will increase recovery time, but I
guess they've taken that into consideration :-)