netdev - [PATCH v2 net-next 0/6] tcp: better handling of memory pressure

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Message-Id: <1431718770-3815-1-git-send-email-edumazet@google.com>
Date:	Fri, 15 May 2015 12:39:24 -0700
From:	Eric Dumazet <edumazet@...gle.com>
To:	"David S. Miller" <davem@...emloft.net>
Cc:	netdev <netdev@...r.kernel.org>, Jason Baron <jbaron@...mai.com>,
	Neal Cardwell <ncardwell@...gle.com>,
	Yuchung Cheng <ycheng@...gle.com>,
	Eric Dumazet <eric.dumazet@...il.com>,
	Eric Dumazet <edumazet@...gle.com>
Subject: [PATCH v2 net-next 0/6] tcp: better handling of memory pressure

When testing commit 790ba4566c1a ("tcp: set SOCK_NOSPACE under memory
pressure") using edge triggered epoll applications, I found various
issues under memory pressure and thousands of active sockets.

This patch series is a first round to solve these issues, in send
and receive paths. There are probably other fixes needed, but
with this series, my tests now all succeed.

v2: fix typo in "allow one skb to be received per socket under memory pressure",
as spotted by Jason Baron.

Eric Dumazet (6):
  net: fix sk_mem_reclaim_partial()
  tcp: rename sk_forced_wmem_schedule() to sk_forced_mem_schedule()
  tcp: introduce tcp_under_memory_pressure()
  tcp: fix behavior for epoll edge trigger
  tcp: allow one skb to be received per socket under memory pressure
  tcp: halves tcp_mem[] limits

 include/net/sock.h    |  6 +++---
 include/net/tcp.h     | 10 ++++++++++
 net/core/sock.c       |  9 +++++----
 net/ipv4/tcp.c        | 24 ++++++++++++++++++------
 net/ipv4/tcp_input.c  | 18 ++++++++++--------
 net/ipv4/tcp_output.c | 10 ++++++----
 net/ipv4/tcp_timer.c  |  2 +-
 7 files changed, 53 insertions(+), 26 deletions(-)

-- 
2.2.0.rc0.207.ga3a616c

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