From: Eric Dumazet <>
Date: Mon, 16 Apr 2018 10:33:34 -0700

> 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.

Great work.  I can see how it is less effective without the rcvlowat

Series applied, thanks Eric!

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