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authorYafang Shao <laoar.shao@gmail.com>2018-04-24 23:07:45 +0800
committerDavid S. Miller <davem@davemloft.net>2018-04-24 11:15:32 -0400
commita06ac0d67d9fda7c255476c6391032319030045d (patch)
tree8ed0839695d99367f1e75dc1968c422b91a340c6 /net/ipv4/tcp_output.c
parent8399743a5a6796c8d5858ae3c5afc814201112d4 (diff)
downloadlinux-a06ac0d67d9fda7c255476c6391032319030045d.tar.bz2
Revert "net: init sk_cookie for inet socket"
This reverts commit <c6849a3ac17e> ("net: init sk_cookie for inet socket") Per discussion with Eric, when update sock_net(sk)->cookie_gen, the whole cache cache line will be invalidated, as this cache line is shared with all cpus, that may cause great performace hit. Bellow is the data form Eric. "Performance is reduced from ~5 Mpps to ~3.8 Mpps with 16 RX queues on my host" when running synflood test. Have to revert it to prevent from cache line false sharing. Signed-off-by: Yafang Shao <laoar.shao@gmail.com> Reviewed-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp_output.c')
0 files changed, 0 insertions, 0 deletions