queue-4.14/tcp-reduce-tcp_fastretrans_alert-verbosity.patch

   1 From foo@baz Mon 17 Jun 2019 06:56:41 PM CEST
   2 From: Eric Dumazet <edumazet@google.com>
   3 Date: Thu, 5 Oct 2017 22:21:25 -0700
   4 Subject: tcp: reduce tcp_fastretrans_alert() verbosity
   5
   6 From: Eric Dumazet <edumazet@google.com>
   7
   8 commit 8ba6ddaaf86c4c6814774e4e4ef158b732bd9f9f upstream.
   9
  10 With upcoming rb-tree implementation, the checks will trigger
  11 more often, and this is expected.
  12
  13 Signed-off-by: Eric Dumazet <edumazet@google.com>
  14 Signed-off-by: David S. Miller <davem@davemloft.net>
  15 Cc: Amit Shah <amit@infradead.org>
  16 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  17 ---
  18  net/ipv4/tcp_input.c |    4 ++--
  19  1 file changed, 2 insertions(+), 2 deletions(-)
  20
  21 --- a/net/ipv4/tcp_input.c
  22 +++ b/net/ipv4/tcp_input.c
  23 @@ -2810,9 +2810,9 @@ static void tcp_fastretrans_alert(struct
  24         bool do_lost = is_dupack || ((flag & FLAG_DATA_SACKED) &&
  25                                     (tcp_fackets_out(tp) > tp->reordering));
  26
  27 -       if (WARN_ON(!tp->packets_out && tp->sacked_out))
  28 +       if (!tp->packets_out && tp->sacked_out)
  29                 tp->sacked_out = 0;
  30 -       if (WARN_ON(!tp->sacked_out && tp->fackets_out))
  31 +       if (!tp->sacked_out && tp->fackets_out)
  32                 tp->fackets_out = 0;
  33
  34         /* Now state machine starts.