Quotes from RFC4821 7.2.  Selecting Initial Values

    It is RECOMMENDED that search_low be initially set to an MTU size
    that is likely to work over a very wide range of environments.  Given
    today's technologies, a value of 1024 bytes is probably safe enough.
    The initial value for search_low SHOULD be configurable.

Moreover, set a small value will introduce extra time for the search
to converge. So set the initial probe base mss size to 1024 Bytes.

Signed-off-by: Fan Du <redacted>
---
  include/net/tcp.h |    2 +-
  1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/include/net/tcp.h b/include/net/tcp.h
index 8d6b983..7b57e5b 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h

@@ -65,7 +65,7 @@ void tcp_time_wait(struct sock *sk, int state, int timeo);
  #define TCP_MIN_MSS		88U
  
  /* The least MTU to use for probing */
-#define TCP_BASE_MSS		512
+#define TCP_BASE_MSS		1024
  
  /* After receiving this amount of duplicate ACKs fast retransmit starts. */
  #define TCP_FASTRETRANS_THRESH 3