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Message-Id: <20120601.142325.1372147261206298305.davem@davemloft.net> Date: Fri, 01 Jun 2012 14:23:25 -0400 (EDT) From: David Miller <davem@...emloft.net> To: eric.dumazet@...il.com Cc: hans.schillstrom@...csson.com, netdev@...r.kernel.org, ncardwell@...gle.com, brouer@...hat.com, therbert@...gle.com Subject: Re: [PATCH v2] tcp: reflect SYN queue_mapping into SYNACK packets From: Eric Dumazet <eric.dumazet@...il.com> Date: Fri, 01 Jun 2012 13:47:50 +0200 > From: Eric Dumazet <edumazet@...gle.com> > > 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. > > Signed-off-by: Eric Dumazet <edumazet@...gle.com> Applied. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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