netdev - [PATCH v2 net-next 0/2] tcp: final (?) round of mem pressure fixes

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Date:   Tue, 14 Jun 2022 10:17:32 -0700
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>
Cc:     netdev <netdev@...r.kernel.org>,
        Soheil Hassas Yeganeh <soheil@...gle.com>,
        Wei Wang <weiwan@...gle.com>,
        Shakeel Butt <shakeelb@...gle.com>,
        Neal Cardwell <ncardwell@...gle.com>,
        Eric Dumazet <edumazet@...gle.com>,
        Eric Dumazet <eric.dumazet@...il.com>
Subject: [PATCH v2 net-next 0/2] tcp: final (?) round of mem pressure fixes

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

While working on prior patch series (e10b02ee5b6c "Merge branch
'net-reduce-tcp_memory_allocated-inflation'"), I found that we
could still have frozen TCP flows under memory pressure.

I thought we had solved this in 2015, but the fix was not complete.

v2: deal with zerocopy tx paths.

Eric Dumazet (2):
  tcp: fix over estimation in sk_forced_mem_schedule()
  tcp: fix possible freeze in tx path under memory pressure

 net/ipv4/tcp.c        | 33 +++++++++++++++++++++++++++++----
 net/ipv4/tcp_output.c |  7 ++++---
 2 files changed, 33 insertions(+), 7 deletions(-)

-- 
2.36.1.476.g0c4daa206d-goog