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>
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index fdc39b4..3a01e55 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -2967,8 +2967,7 @@ u32 __tcp_select_window(struct sock *sk)
icsk->icsk_ack.quick = 0;
if (tcp_under_memory_pressure(sk))
- tp->rcv_ssthresh = min(tp->rcv_ssthresh,
- 4U * tp->advmss);
+ tcp_adjust_rcv_ssthresh(sk);
/* free_space might become our new window, make sure we don't
* increase it due to wscale.