netdev - [PATCH net-next 0/3] tcp: better deal with delayed TX completions

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Message-Id: <20210311203506.3450792-1-eric.dumazet@gmail.com>
Date:   Thu, 11 Mar 2021 12:35:03 -0800
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     netdev <netdev@...r.kernel.org>,
        Eric Dumazet <edumazet@...gle.com>,
        Eric Dumazet <eric.dumazet@...il.com>,
        Neal Cardwell <ncardwell@...gle.com>,
        Yuchung Cheng <ycheng@...gle.com>,
        Neil Spring <ntspring@...com>
Subject: [PATCH net-next 0/3] tcp: better deal with delayed TX completions

From: Eric Dumazet <edumazet@...gle.com>

Jakub and Neil reported an increase of RTO timers whenever
TX completions are delayed a bit more (by increasing
NIC TX coalescing parameters)

While problems have been there forever, second patch might
introduce some regressions so I prefer not backport
them to stable releases before things settle.

Many thanks to FB team for their help and tests.

Few packetdrill tests need to be changed to reflect
the improvements brought by this series.

Eric Dumazet (3):
  tcp: plug skb_still_in_host_queue() to TSQ
  tcp: consider using standard rtx logic in tcp_rcv_fastopen_synack()
  tcp: remove obsolete check in __tcp_retransmit_skb()

 include/linux/skbuff.h |  2 +-
 net/ipv4/tcp_input.c   | 10 ++++------
 net/ipv4/tcp_output.c  | 20 ++++++++------------
 3 files changed, 13 insertions(+), 19 deletions(-)

-- 
2.31.0.rc2.261.g7f71774620-goog