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authorYuchung Cheng <ycheng@google.com>2017-11-08 13:01:26 -0800
committerDavid S. Miller <davem@davemloft.net>2017-11-11 18:53:16 +0900
commit713bafea92920103cd3d361657406cf04d0e22dd (patch)
tree505a887887bb48dc443388b0078ad176ff6edb5b /net/ipv4/tcp_metrics.c
parentfsl/fman_port: mark expected switch fall-throughs (diff)
downloadlinux-dev-713bafea92920103cd3d361657406cf04d0e22dd.tar.xz
linux-dev-713bafea92920103cd3d361657406cf04d0e22dd.zip
tcp: retire FACK loss detection
FACK loss detection has been disabled by default and the successor RACK subsumed FACK and can handle reordering better. This patch removes FACK to simplify TCP loss recovery. Signed-off-by: Yuchung Cheng <ycheng@google.com> Reviewed-by: Eric Dumazet <edumazet@google.com> Reviewed-by: Neal Cardwell <ncardwell@google.com> Reviewed-by: Soheil Hassas Yeganeh <soheil@google.com> Reviewed-by: Priyaranjan Jha <priyarjha@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp_metrics.c')
-rw-r--r--net/ipv4/tcp_metrics.c4
1 files changed, 1 insertions, 3 deletions
diff --git a/net/ipv4/tcp_metrics.c b/net/ipv4/tcp_metrics.c
index 9d5ddebfd831..7097f92d16e5 100644
--- a/net/ipv4/tcp_metrics.c
+++ b/net/ipv4/tcp_metrics.c
@@ -470,10 +470,8 @@ void tcp_init_metrics(struct sock *sk)
tp->snd_ssthresh = TCP_INFINITE_SSTHRESH;
}
val = tcp_metric_get(tm, TCP_METRIC_REORDERING);
- if (val && tp->reordering != val) {
- tcp_disable_fack(tp);
+ if (val && tp->reordering != val)
tp->reordering = val;
- }
crtt = tcp_metric_get(tm, TCP_METRIC_RTT);
rcu_read_unlock();