netdev - Re: [net-next PATCH] ipv4: FIB Local/MAIN table collapse

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Message-Id: <20150311.162850.1722797143871993349.davem@davemloft.net>
Date:	Wed, 11 Mar 2015 16:28:50 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	alexander.h.duyck@...hat.com
Cc:	netdev@...r.kernel.org, stephen@...workplumber.org,
	jiri@...nulli.us, sfeldma@...il.com
Subject: Re: [net-next PATCH] ipv4: FIB Local/MAIN table collapse

From: Alexander Duyck <alexander.h.duyck@...hat.com>
Date: Fri, 06 Mar 2015 13:47:00 -0800

> This patch is meant to collapse local and main into one by converting
> tb_data from an array to a pointer.  Doing this allows us to point the
> local table into the main while maintaining the same variables in the
> table.
> 
> As such the tb_data was converted from an array to a pointer, and a new
> array called data is added in order to still provide an object for tb_data
> to point to.
> 
> In order to track the origin of the fib aliases a tb_id value was added in
> a hole that existed on 64b systems.  Using this we can also reverse the
> merge in the event that custom FIB rules are enabled.
> 
> With this patch I am seeing an improvement of 20ns to 30ns for routing
> lookups as long as custom rules are not enabled, with custom rules enabled
> we fall back to split tables and the original behavior.
> 
> Signed-off-by: Alexander Duyck <alexander.h.duyck@...hat.com>

I've applied this, let's see what happens.
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