From: David S. Miller <davem@davemloft.net>
Date: Mon, 16 Apr 2018 22:26:38 +0000 (-0400)
Subject: Merge branch 'tcp-zero-copy-receive'
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=309c446cb45f6663932c8e6d0754f4ac81d1b5cd;p=linux.git

Merge branch 'tcp-zero-copy-receive'

Eric Dumazet says:

====================
tcp: add zero copy receive

This patch series add mmap() support to TCP sockets for RX zero copy.

While tcp_mmap() patch itself is quite small (~100 LOC), optimal support
for asynchronous mmap() required better SO_RCVLOWAT behavior, and a
test program to demonstrate how mmap() on TCP sockets can be used.

Note that mmap() (and associated munmap()) calls are adding more
pressure on per-process VM semaphore, so might not show benefit
for processus with high number of threads.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
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309c446cb45f6663932c8e6d0754f4ac81d1b5cd