fec8fe8069
Refreshed all patches Remove upstreamed patches. - 103-MIPS-ath79-fix-register-address-in-ath79_ddr_wb_flus.patch - 403-mtd_fix_cfi_cmdset_0002_status_check.patch - 001-4.11-01-mtd-m25p80-consider-max-message-size-in-m25p80_read.patch - 001-4.15-08-bcm63xx_enet-correct-clock-usage.patch - 001-4.15-09-bcm63xx_enet-do-not-write-to-random-DMA-channel-on-B.patch - 900-gen_stats-fix-netlink-stats-padding.patch Introduce a new backported patch to address ext4 breakage, introduced in 4.9.112 - backport-4.9/500-ext4-fix-check-to-prevent-initializing-reserved-inod.patch This patch has been slightly altered to compensate for a new helper function introduced in later kernels. Also add ARM64_SSBD symbol to ARM64 targets still running kernel 4.9 Compile-tested on: ar71xx, bcm2710 Runtime-tested on: ar71xx Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>
56 lines
1.8 KiB
Diff
56 lines
1.8 KiB
Diff
From 12a59abc22d6664f7d3944f625ceefee92de8820 Mon Sep 17 00:00:00 2001
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From: Eric Dumazet <edumazet@google.com>
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Date: Sat, 3 Dec 2016 11:14:55 -0800
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Subject: [PATCH 06/10] tcp: tcp_mtu_probe() is likely to exit early
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Adding a likely() in tcp_mtu_probe() moves its code which used to
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be inlined in front of tcp_write_xmit()
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We still have a cache line miss to access icsk->icsk_mtup.enabled,
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we will probably have to reorganize fields to help data locality.
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Signed-off-by: Eric Dumazet <edumazet@google.com>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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---
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net/ipv4/tcp_output.c | 18 +++++++++---------
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1 file changed, 9 insertions(+), 9 deletions(-)
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--- a/net/ipv4/tcp_output.c
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+++ b/net/ipv4/tcp_output.c
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@@ -1960,26 +1960,26 @@ static bool tcp_can_coalesce_send_queue_
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*/
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static int tcp_mtu_probe(struct sock *sk)
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{
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- struct tcp_sock *tp = tcp_sk(sk);
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struct inet_connection_sock *icsk = inet_csk(sk);
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+ struct tcp_sock *tp = tcp_sk(sk);
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struct sk_buff *skb, *nskb, *next;
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struct net *net = sock_net(sk);
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- int len;
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int probe_size;
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int size_needed;
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- int copy;
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+ int copy, len;
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int mss_now;
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int interval;
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/* Not currently probing/verifying,
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* not in recovery,
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* have enough cwnd, and
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- * not SACKing (the variable headers throw things off) */
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- if (!icsk->icsk_mtup.enabled ||
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- icsk->icsk_mtup.probe_size ||
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- inet_csk(sk)->icsk_ca_state != TCP_CA_Open ||
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- tp->snd_cwnd < 11 ||
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- tp->rx_opt.num_sacks || tp->rx_opt.dsack)
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+ * not SACKing (the variable headers throw things off)
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+ */
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+ if (likely(!icsk->icsk_mtup.enabled ||
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+ icsk->icsk_mtup.probe_size ||
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+ inet_csk(sk)->icsk_ca_state != TCP_CA_Open ||
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+ tp->snd_cwnd < 11 ||
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+ tp->rx_opt.num_sacks || tp->rx_opt.dsack))
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return -1;
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/* Use binary search for probe_size between tcp_mss_base,
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