From mboxrd@z Thu Jan 1 00:00:00 1970 From: Hans Schillstrom Subject: Re: [PATCH] tcp: reflect SYN queue_mapping into SYNACK packets Date: Fri, 1 Jun 2012 12:45:16 +0200 Message-ID: <201206011248.26748.hans.schillstrom@ericsson.com> References: <1338544881.2760.1502.camel@edumazet-glaptop> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Cc: netdev , Neal Cardwell , Jesper Dangaard Brouer , Tom Herbert To: Eric Dumazet Return-path: Received: from mailgw7.ericsson.se ([193.180.251.48]:49858 "EHLO mailgw7.ericsson.se" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758920Ab2FAKsb (ORCPT ); Fri, 1 Jun 2012 06:48:31 -0400 In-Reply-To: <1338544881.2760.1502.camel@edumazet-glaptop> Content-Disposition: inline Sender: netdev-owner@vger.kernel.org List-ID: On Friday 01 June 2012 12:01:21 Eric Dumazet wrote: > From: Eric Dumazet > > While testing how linux behaves on SYNFLOOD attack on multiqueue device > (ixgbe), I found that SYNACK messages were dropped at Qdisc level > because we send them all on a single queue. > > Obvious choice is to reflect incoming SYN packet @queue_mapping to > SYNACK packet. > > Under stress, my machine could only send 25.000 SYNACK per second (for > 200.000 incoming SYN per second). NIC : ixgbe with 16 rx/tx queues. > > After patch, not a single SYNACK is dropped. > Great, that was just what I was looking for Will try to get this on into test to day. IPv6, do you add that as well ? -- Regards Hans Schillstrom