On 9/18/25 6:21 PM, [email protected] wrote: > diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c > index 9fdc6ce25eb1..0b25bf03ae6a 100644 > --- a/net/ipv4/tcp_input.c > +++ b/net/ipv4/tcp_input.c > @@ -488,6 +488,10 @@ static void tcp_count_delivered(struct tcp_sock *tp, u32 > delivered, > tcp_count_delivered_ce(tp, delivered); > } > > +#define PKTS_ACKED_WEIGHT 6 > +#define PKTS_ACKED_PREC 6 > +#define ACK_COMP_THRESH 4 > + > /* Returns the ECN CE delta */ > static u32 __tcp_accecn_process(struct sock *sk, const struct sk_buff *skb, > u32 delivered_pkts, u32 delivered_bytes, > @@ -507,6 +511,19 @@ static u32 __tcp_accecn_process(struct sock *sk, const > struct sk_buff *skb, > opt_deltas_valid = tcp_accecn_process_option(tp, skb, > delivered_bytes, flag); > > + if (delivered_pkts) { > + if (!tp->pkts_acked_ewma) { > + tp->pkts_acked_ewma = delivered_pkts << PKTS_ACKED_PREC;
Can the above statement overflow pkts_acked_ewma in exceptional cases? Do that need and additional min_t(u32, <init val>, 0xFFFFU)? /P
