> On Tue, 2015-07-07 at 14:22 +1000, Jon Maxwell wrote:
>
>
> > @@ -4887,6 +4884,7 @@ static inline void tcp_data_snd_check(struct sock
> > *sk)
> > static void __tcp_ack_snd_check(struct sock *sk, int ofo_possible)
> > {
> > struct tcp_sock *tp = tcp_sk(sk);
> > +const struct dst_entry
On Tue, 2015-07-07 at 14:22 +1000, Jon Maxwell wrote:
> @@ -4887,6 +4884,7 @@ static inline void tcp_data_snd_check(struct sock *sk)
> static void __tcp_ack_snd_check(struct sock *sk, int ofo_possible)
> {
> struct tcp_sock *tp = tcp_sk(sk);
> + const struct dst_entry *dst = __sk_dst_
I ran some tests and after setting the "ip route change quickack 1"
knob there were still many delayed ACKs sent. This occured
because when icsk_ack.quick=0 the !icsk_ack.pingpong value is
subsequently ignored as tcp_in_quickack_mode() checks both these
values. The condition for a quick ack to
