mirror of
https://github.com/dynup/kpatch
synced 2024-12-21 04:39:57 +00:00
59 lines
1.7 KiB
Diff
59 lines
1.7 KiB
Diff
|
This patch is for 3.10.x.
|
||
|
|
It combines the following commits from the mainline:
|
||
|
|
|
||
|
|
commit 30927520dbae297182990bb21d08762bcc35ce1d
|
||
|
|
Author: Eric Dumazet <edumazet@google.com>
|
||
|
|
Date: Wed Sep 9 21:55:07 2015 -0700
|
||
|
|
|
||
|
|
tcp_cubic: better follow cubic curve after idle period
|
||
|
|
|
||
|
|
commit c2e7204d180f8efc80f27959ca9cf16fa17f67db
|
||
|
|
Author: Eric Dumazet <edumazet@google.com>
|
||
|
|
Date: Thu Sep 17 08:38:00 2015 -0700
|
||
|
|
|
||
|
|
tcp_cubic: do not set epoch_start in the future
|
||
|
|
|
||
|
|
References:
|
||
|
|
http://www.phoronix.com/scan.php?page=news_item&px=Google-Fixes-TCP-Linux
|
||
|
|
|
||
|
|
diff --git a/net/ipv4/tcp_cubic.c b/net/ipv4/tcp_cubic.c
|
||
|
|
index 894b7ce..872b3a0 100644
|
||
|
|
--- a/net/ipv4/tcp_cubic.c
|
||
|
|
+++ b/net/ipv4/tcp_cubic.c
|
||
|
|
@@ -153,6 +153,27 @@ static void bictcp_init(struct sock *sk)
|
||
|
|
tcp_sk(sk)->snd_ssthresh = initial_ssthresh;
|
||
|
|
}
|
||
|
|
|
||
|
|
+static void bictcp_cwnd_event(struct sock *sk, enum tcp_ca_event event)
|
||
|
|
+{
|
||
|
|
+ if (event == CA_EVENT_TX_START) {
|
||
|
|
+ struct bictcp *ca = inet_csk_ca(sk);
|
||
|
|
+ u32 now = tcp_time_stamp;
|
||
|
|
+ s32 delta;
|
||
|
|
+
|
||
|
|
+ delta = now - tcp_sk(sk)->lsndtime;
|
||
|
|
+
|
||
|
|
+ /* We were application limited (idle) for a while.
|
||
|
|
+ * Shift epoch_start to keep cwnd growth to cubic curve.
|
||
|
|
+ */
|
||
|
|
+ if (ca->epoch_start && delta > 0) {
|
||
|
|
+ ca->epoch_start += delta;
|
||
|
|
+ if (after(ca->epoch_start, now))
|
||
|
|
+ ca->epoch_start = now;
|
||
|
|
+ }
|
||
|
|
+ return;
|
||
|
|
+ }
|
||
|
|
+}
|
||
|
|
+
|
||
|
|
/* calculate the cubic root of x using a table lookup followed by one
|
||
|
|
* Newton-Raphson iteration.
|
||
|
|
* Avg err ~= 0.195%
|
||
|
|
@@ -439,6 +460,7 @@ static struct tcp_congestion_ops cubictcp __read_mostly = {
|
||
|
|
.cong_avoid = bictcp_cong_avoid,
|
||
|
|
.set_state = bictcp_state,
|
||
|
|
.undo_cwnd = bictcp_undo_cwnd,
|
||
|
|
+ .cwnd_event = bictcp_cwnd_event,
|
||
|
|
.pkts_acked = bictcp_acked,
|
||
|
|
.owner = THIS_MODULE,
|
||
|
|
.name = "cubic",
|