Paolo Abeni <pabeni(a)redhat.com> wrote:
> plugging unacked sequence update into sendmsg() is not enough;
> use the msk icsk retransmit timer to trigger una updates. The
> timer freqeuncy is based on the current subflow RTO estimation.

Looks fine to me, I think we will need the timer in any
case to trigger mptcp level retrans so might as well handle the
una update there as well.