From: David S. Miller <davem@davemloft.net>
Date: Tue, 5 Apr 2016 02:11:21 +0000 (-0400)
Subject: Merge branch 'tcp-udp-misc'
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=15f41e2ba13a6726632e44b1180e805a61e470ad;p=linux-beck.git

Merge branch 'tcp-udp-misc'

Eric Dumazet says:

====================
net: various udp/tcp changes

First round of patches for linux-4.7

Add a generic facility for sockets to be freed after an RCU grace
period, if they need to.

Then UDP stack is changed to no longer use SLAB_DESTROY_BY_RCU,
in order to speedup rx processing for traffic encapsulated in UDP.
It gives a 17 % speedup for normal UDP reception in stress conditions.

Then TCP listeners are changed to use SOCK_RCU_FREE as well
to avoid touching sk_refcnt in synflood case :
I got up to 30 % performance increase for a mono listener.

Then three patches add SK_MEMINFO_DROPS to sock_diag
and add per socket rx drops accounting to TCP.

Last patch adds rate limiting on ACK sent on behalf of SYN_RECV
to better resist to SYNFLOOD targeting one or few flows.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
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15f41e2ba13a6726632e44b1180e805a61e470ad