diff options
Diffstat (limited to 'target/linux/generic/backport-4.19/025-tcp-allow-drivers-to-tweak-TSQ-logic.patch')
| -rw-r--r-- | target/linux/generic/backport-4.19/025-tcp-allow-drivers-to-tweak-TSQ-logic.patch | 85 |
1 files changed, 0 insertions, 85 deletions
diff --git a/target/linux/generic/backport-4.19/025-tcp-allow-drivers-to-tweak-TSQ-logic.patch b/target/linux/generic/backport-4.19/025-tcp-allow-drivers-to-tweak-TSQ-logic.patch deleted file mode 100644 index d9215505ee..0000000000 --- a/target/linux/generic/backport-4.19/025-tcp-allow-drivers-to-tweak-TSQ-logic.patch +++ /dev/null @@ -1,85 +0,0 @@ -From: Eric Dumazet <edumazet@google.com> -Date: Sat, 11 Nov 2017 15:54:12 -0800 -Subject: [PATCH] tcp: allow drivers to tweak TSQ logic -MIME-Version: 1.0 -Content-Type: text/plain; charset=UTF-8 -Content-Transfer-Encoding: 8bit - -I had many reports that TSQ logic breaks wifi aggregation. - -Current logic is to allow up to 1 ms of bytes to be queued into qdisc -and drivers queues. - -But Wifi aggregation needs a bigger budget to allow bigger rates to -be discovered by various TCP Congestion Controls algorithms. - -This patch adds an extra socket field, allowing wifi drivers to select -another log scale to derive TCP Small Queue credit from current pacing -rate. - -Initial value is 10, meaning that this patch does not change current -behavior. - -We expect wifi drivers to set this field to smaller values (tests have -been done with values from 6 to 9) - -They would have to use following template : - -if (skb->sk && skb->sk->sk_pacing_shift != MY_PACING_SHIFT) - skb->sk->sk_pacing_shift = MY_PACING_SHIFT; - -Ref: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041 -Signed-off-by: Eric Dumazet <edumazet@google.com> -Cc: Johannes Berg <johannes.berg@intel.com> -Cc: Toke Høiland-Jørgensen <toke@toke.dk> -Cc: Kir Kolyshkin <kir@openvz.org> ---- ---- a/include/net/sock.h -+++ b/include/net/sock.h -@@ -267,6 +267,7 @@ struct sock_common { - * @sk_gso_type: GSO type (e.g. %SKB_GSO_TCPV4) - * @sk_gso_max_size: Maximum GSO segment size to build - * @sk_gso_max_segs: Maximum number of GSO segments -+ * @sk_pacing_shift: scaling factor for TCP Small Queues - * @sk_lingertime: %SO_LINGER l_linger setting - * @sk_backlog: always used with the per-socket spinlock held - * @sk_callback_lock: used with the callbacks in the end of this struct -@@ -445,6 +446,8 @@ struct sock { - sk_type : 16; - #define SK_PROTOCOL_MAX U8_MAX - u16 sk_gso_max_segs; -+#define sk_pacing_shift sk_pacing_shift /* for backport checks */ -+ u8 sk_pacing_shift; - unsigned long sk_lingertime; - struct proto *sk_prot_creator; - rwlock_t sk_callback_lock; ---- a/net/core/sock.c -+++ b/net/core/sock.c -@@ -2739,6 +2739,7 @@ void sock_init_data(struct socket *sock, - - sk->sk_max_pacing_rate = ~0U; - sk->sk_pacing_rate = ~0U; -+ sk->sk_pacing_shift = 10; - sk->sk_incoming_cpu = -1; - /* - * Before updating sk_refcnt, we must commit prior changes to memory ---- a/net/ipv4/tcp_output.c -+++ b/net/ipv4/tcp_output.c -@@ -1683,7 +1683,7 @@ u32 tcp_tso_autosize(const struct sock * - { - u32 bytes, segs; - -- bytes = min(sk->sk_pacing_rate >> 10, -+ bytes = min(sk->sk_pacing_rate >> sk->sk_pacing_shift, - sk->sk_gso_max_size - 1 - MAX_TCP_HEADER); - - /* Goal is to send at least one packet per ms, -@@ -2184,7 +2184,7 @@ static bool tcp_small_queue_check(struct - { - unsigned int limit; - -- limit = max(2 * skb->truesize, sk->sk_pacing_rate >> 10); -+ limit = max(2 * skb->truesize, sk->sk_pacing_rate >> sk->sk_pacing_shift); - limit = min_t(u32, limit, sysctl_tcp_limit_output_bytes); - limit <<= factor; - |