netdev - Re: [PATCH net-next 0/2] tcp: final work on SYNFLOOD behavior

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Date:	Fri, 15 Apr 2016 16:46:13 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	edumazet@...gle.com
Cc:	netdev@...r.kernel.org, eric.dumazet@...il.com
Subject: Re: [PATCH net-next 0/2] tcp: final work on SYNFLOOD behavior

From: Eric Dumazet <edumazet@...gle.com>
Date: Wed, 13 Apr 2016 22:05:38 -0700

> In the first patch, I remove the costly association of SYNACK+COOKIES
> to a listener. I believe other parts of the stack should be ready.
> 
> The second patch removes a useless write into listener socket
> in tcp_rcv_state_process(), incurring false sharing in
> tcp_conn_request()
> 
> Performance under SYNFLOOD goes from 3.2 Mpps to 6 Mpps.

Geese, you almost make it look too easy....

> Test was using a single TCP listener, on a host with 8 RX queues
> on the NIC, and 24 cores (48 ht)

Looks good, series applied, thanks Eric.