netdev - [PATCH net 0/4] tcp: add three static keys

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Date:   Fri, 14 Jun 2019 16:22:17 -0700
From:   Eric Dumazet <edumazet@...gle.com>
To:     "David S . Miller" <davem@...emloft.net>
Cc:     netdev <netdev@...r.kernel.org>,
        Eric Dumazet <edumazet@...gle.com>,
        Willem de Bruijn <willemb@...gle.com>,
        Feng Tang <feng.tang@...el.com>,
        Eric Dumazet <eric.dumazet@...il.com>
Subject: [PATCH net 0/4] tcp: add three static keys

Recent addition of per TCP socket rx/tx cache brought
regressions for some workloads, as reported by Feng Tang.

It seems better to make them opt-in, before we adopt better
heuristics.

The last patch adds high_order_alloc_disable sysctl
to ask TCP sendmsg() to exclusively use order-0 allocations,
as mm layer has specific optimizations.

Eric Dumazet (4):
  sysctl: define proc_do_static_key()
  tcp: add tcp_rx_skb_cache sysctl
  tcp: add tcp_tx_skb_cache sysctl
  net: add high_order_alloc_disable sysctl/static key

 Documentation/networking/ip-sysctl.txt |  8 +++++
 include/linux/bpf.h                    |  1 -
 include/linux/sysctl.h                 |  3 ++
 include/net/sock.h                     | 12 ++++---
 kernel/bpf/core.c                      |  1 -
 kernel/sysctl.c                        | 44 ++++++++++++++------------
 net/core/sock.c                        |  4 ++-
 net/core/sysctl_net_core.c             |  7 ++++
 net/ipv4/sysctl_net_ipv4.c             | 17 ++++++++++
 9 files changed, 68 insertions(+), 29 deletions(-)

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2.22.0.410.gd8fdbe21b5-goog