netdev - Re: [PATCH v2 net-next 0/3] ipv4: Hash-based multipath routing

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Message-Id: <20150829.131429.360433621593751136.davem@davemloft.net>
Date:	Sat, 29 Aug 2015 13:14:29 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	pch@...bogen.com
Cc:	netdev@...r.kernel.org, kuznet@....inr.ac.ru, jmorris@...ei.org,
	yoshfuji@...ux-ipv6.org, kaber@...sh.net,
	linux-api@...r.kernel.org, roopa@...ulusnetworks.com,
	sfeldma@...il.com, ebiederm@...ssion.com,
	nicolas.dichtel@...nd.com, tgraf@...g.ch, jbenc@...hat.com
Subject: Re: [PATCH v2 net-next 0/3] ipv4: Hash-based multipath routing

From: pch@...bogen.com
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.

This puts ipv4 in line with ipv6, and nobody cares about the existing
round robin behavior at all.

Thanks.
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