On Tue, 2016-10-11 at 20:56 -0700, Yuchung Cheng wrote:
> I thought more about this patch on my way home and have more
> questions: why do we exclude RTO retransmission specifically? also
> when we rehash, we'll introduce reordering either in recovery or after
> recovery, as some TCP CC like bbr would continue sending regardlessly,
> so starting in tcp_ack() with tp->txhash_want does not really prevent
> causing more reordering.
Note that changing txhash during a non rto retransmit is going to break
pacing on a bonding setup, since the change in txhash will likely select
a different slave, where MQ+FQ are the qdisc in place.