From: Eric Dumazet
Date: Fri, 1 Apr 2016 08:52:11 -0700
> First round of patches for linux-4.7
Nice series, applied.
I honestly think we can elide socket memory accounting for
(non-data-bearing) SYNACKs if that's showing up in the perf
profiles for SYN attacks.
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
