From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter =?UTF-8?B?TsO4cmx1bmQ=?= Subject: Re: [PATCH v2 net-next 0/3] ipv4: Hash-based multipath routing Date: Sat, 29 Aug 2015 22:31:15 +0200 Message-ID: <20150829223115.523553db@tyr> References: <1440792050-2109-1-git-send-email-pch@ordbogen.com> <20150829.131429.360433621593751136.davem@davemloft.net> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20150829.131429.360433621593751136.davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org> Sender: linux-api-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: David Miller Cc: netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, kuznet-v/Mj1YrvjDBInbfyfbPRSQ@public.gmane.org, jmorris-gx6/JNMH7DfYtjvyW6yDsg@public.gmane.org, yoshfuji-VfPWfsRibaP+Ru+s062T9g@public.gmane.org, kaber-dcUjhNyLwpNeoWH0uzbU5w@public.gmane.org, linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, roopa-qUQiAmfTcIp+XZJcv9eMoEEOCMrvLtNR@public.gmane.org, sfeldma-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, ebiederm-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org, nicolas.dichtel-pdR9zngts4EAvxtiuMwx3w@public.gmane.org, tgraf-G/eBtMaohhA@public.gmane.org, jbenc-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org List-Id: linux-api@vger.kernel.org On Sat, 29 Aug 2015 13:14:29 -0700 (PDT) David Miller wrote: > From: pch-chEQUL3jiZBWk0Htik3J/w@public.gmane.org > Date: Fri, 28 Aug 2015 22:00:47 +0200 > > > When the routing cache was removed in 3.6, the IPv4 multipath > > algorithm changed from more or less being destination-based into > > being quasi-random per-packet scheduling. This increases the risk > > of out-of-order packets and makes it impossible to use multipath > > together with anycast services. > > Don't even try to be fancy. > > Simply kill the round-robin stuff off completely, and make hash based > routing the one and only mode, no special configuration stuff > necessary. I like the sound of that! Just to be clear - are you telling me to stick with L3 and skip the L4 part? > > This puts ipv4 in line with ipv6, and nobody cares about the existing > round robin behavior at all. > > Thanks.