diff options
| author |   Wei Wang <weiwan@google.com> | 2021-09-29 10:25:13 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2021-09-30 13:36:46 +0100 |
| commit | 053f368412c9a7bfce2befec8c795113c8cfb0b1 (patch) | |
| tree | 30f0da3c75f0c65934cf3e42cd43c3fb8d4d0488 /include/net/tcp.h | |
| parent | tcp: adjust sndbuf according to sk_reserved_mem (diff) | |
| download | linux-dev-053f368412c9a7bfce2befec8c795113c8cfb0b1.tar.xz linux-dev-053f368412c9a7bfce2befec8c795113c8cfb0b1.zip | |
tcp: adjust rcv_ssthresh according to sk_reserved_mem
When user sets SO_RESERVE_MEM socket option, in order to utilize the
reserved memory when in memory pressure state, we adjust rcv_ssthresh
according to the available reserved memory for the socket, instead of
using 4 * advmss always.
Signed-off-by: Wei Wang <weiwan@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/tcp.h')
| -rw-r--r-- | include/net/tcp.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/net/tcp.h b/include/net/tcp.h index 32cf6c01f403..4c2898ac6569 100644 --- a/include/net/tcp.h +++ b/include/net/tcp.h @@ -1421,6 +1421,17 @@ static inline int tcp_full_space(const struct sock *sk) return tcp_win_from_space(sk, READ_ONCE(sk->sk_rcvbuf)); } +static inline void tcp_adjust_rcv_ssthresh(struct sock *sk) +{ + int unused_mem = sk_unused_reserved_mem(sk); + struct tcp_sock *tp = tcp_sk(sk); + + tp->rcv_ssthresh = min(tp->rcv_ssthresh, 4U * tp->advmss); + if (unused_mem) + tp->rcv_ssthresh = max_t(u32, tp->rcv_ssthresh, + tcp_win_from_space(sk, unused_mem)); +} + void tcp_cleanup_rbuf(struct sock *sk, int copied); /* We provision sk_rcvbuf around 200% of sk_rcvlowat. |