From mboxrd@z Thu Jan 1 00:00:00 1970 From: Hannes Frederic Sowa Subject: Re: [PATCH RFC] ipv6: use stronger hash for reassembly queue hash table Date: Wed, 13 Mar 2013 02:31:01 +0100 Message-ID: <20130313013101.GF14801@order.stressinduktion.org> References: <20130307214211.GP7941@order.stressinduktion.org> <20130308055718.GA28531@order.stressinduktion.org> <20130308130433.GB28531@order.stressinduktion.org> <1362754386.15793.226.camel@edumazet-glaptop> <20130308150831.GD28531@order.stressinduktion.org> <1362756219.15793.240.camel@edumazet-glaptop> <20130313012715.GE14801@order.stressinduktion.org> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 To: Eric Dumazet , netdev@vger.kernel.org, yoshfuji@linux-ipv6.org, brouer@redhat.com Return-path: Received: from order.stressinduktion.org ([87.106.68.36]:60166 "EHLO order.stressinduktion.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755470Ab3CMBbC (ORCPT ); Tue, 12 Mar 2013 21:31:02 -0400 Content-Disposition: inline In-Reply-To: <20130313012715.GE14801@order.stressinduktion.org> Sender: netdev-owner@vger.kernel.org List-ID: On Wed, Mar 13, 2013 at 02:27:15AM +0100, Hannes Frederic Sowa wrote: > Disable netfilter defragmenation for ipv6 on your machine if you test > this patch, otherwise you won't see the improvment. Machine now runs > smoothly under fragmentation dos. Just to clarify: When I wrote dos above, I actually meant a dos where the addresses have a common ipv6_addr_hash. A simple test tool I wrote for testing is here: https://gist.github.com/hannes/5116331