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>
71 lines
2.2 KiB
Diff
71 lines
2.2 KiB
Diff
From b223feb9de2a65c533ff95c08e834fa732906ea5 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 11:14:52 -0800
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Subject: [PATCH 03/10] tcp: tsq: add shortcut in tcp_tasklet_func()
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Under high stress, I've seen tcp_tasklet_func() consuming
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~700 usec, handling ~150 tcp sockets.
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By setting TCP_TSQ_DEFERRED in tcp_wfree(), we give a chance
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for other cpus/threads entering tcp_write_xmit() to grab it,
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allowing tcp_tasklet_func() to skip sockets that already did
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an xmit cycle.
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In the future, we might give to ACK processing an increased
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budget to reduce even more tcp_tasklet_func() amount of work.
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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 | 22 ++++++++++++----------
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1 file changed, 12 insertions(+), 10 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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@@ -772,19 +772,19 @@ static void tcp_tasklet_func(unsigned lo
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list_for_each_safe(q, n, &list) {
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tp = list_entry(q, struct tcp_sock, tsq_node);
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list_del(&tp->tsq_node);
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+ clear_bit(TSQ_QUEUED, &tp->tsq_flags);
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sk = (struct sock *)tp;
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- bh_lock_sock(sk);
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-
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- if (!sock_owned_by_user(sk)) {
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- tcp_tsq_handler(sk);
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- } else {
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- /* defer the work to tcp_release_cb() */
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- set_bit(TCP_TSQ_DEFERRED, &tp->tsq_flags);
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+ if (!sk->sk_lock.owned &&
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+ test_bit(TCP_TSQ_DEFERRED, &tp->tsq_flags)) {
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+ bh_lock_sock(sk);
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+ if (!sock_owned_by_user(sk)) {
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+ clear_bit(TCP_TSQ_DEFERRED, &tp->tsq_flags);
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+ tcp_tsq_handler(sk);
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+ }
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+ bh_unlock_sock(sk);
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}
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- bh_unlock_sock(sk);
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- clear_bit(TSQ_QUEUED, &tp->tsq_flags);
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sk_free(sk);
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}
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}
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@@ -889,7 +889,7 @@ void tcp_wfree(struct sk_buff *skb)
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if (!(oval & TSQF_THROTTLED) || (oval & TSQF_QUEUED))
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goto out;
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- nval = (oval & ~TSQF_THROTTLED) | TSQF_QUEUED;
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+ nval = (oval & ~TSQF_THROTTLED) | TSQF_QUEUED | TCPF_TSQ_DEFERRED;
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nval = cmpxchg(&tp->tsq_flags, oval, nval);
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if (nval != oval)
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continue;
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@@ -2222,6 +2222,8 @@ static bool tcp_write_xmit(struct sock *
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unlikely(tso_fragment(sk, skb, limit, mss_now, gfp)))
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break;
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+ if (test_bit(TCP_TSQ_DEFERRED, &tp->tsq_flags))
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+ clear_bit(TCP_TSQ_DEFERRED, &tp->tsq_flags);
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if (tcp_small_queue_check(sk, skb, 0))
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break;
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