netdev - Re: ipv6 hitting route max

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Date:	Mon, 06 Jun 2011 16:28:48 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	sim@...tway.ca
Cc:	netdev@...r.kernel.org, yoshfuji@...ux-ipv6.org
Subject: Re: ipv6 hitting route max_size

From: Simon Kirby <sim@...tway.ca>
Date: Mon, 6 Jun 2011 16:15:21 -0700

> On Mon, Jun 06, 2011 at 03:01:42PM -0700, David Miller wrote:
> 
>> From: Simon Kirby <sim@...tway.ca>
>> Date: Mon, 6 Jun 2011 14:37:27 -0700
>> 
>> > /proc/sys/net/ipv6/route/max_size and a number of similar GC knobs exist,
>> > but max_size seems to limit the size of the v6 route table, not the v6
>> > route cache.
>> 
>> There is no v6 route cache.
>> 
>> Instead of a routing cache, ipv6 route lookups "clone" new routes into
>> the same datastructre the route table is stored in.
> 
> Ok, makes sense, but the result is now that ipv4 loads a full Internet
> table with no adjustments, while ipv6 does not. Would it make sense to
> change 4096 to 1048576, or would it be better to count only clones of
> the actual route or something along those lines?

The latter is probably the way to handle this problem.
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