linux-kernel - Re: [PATCH] net: compute a more reasonable default ip6_rt_max

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Message-ID: <4FC02777.5070003@fb.com>
Date:	Fri, 25 May 2012 17:44:39 -0700
From:	Arun Sharma <asharma@...com>
To:	David Miller <davem@...emloft.net>
CC:	<eric.dumazet@...il.com>, <netdev@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] net: compute a more reasonable default ip6_rt_max_size

On 5/25/12 5:11 PM, David Miller wrote:

>> These were not admin configured routes. They were discovered via ipv6
>> neighbor discovery.
>
> Then such default routes should either be:
>
> 1) Passed over by GC
>
> 2) Trigger neighbour discovery when GC'd

It's possible that there is a bug somewhere - we didn't get a chance to 
dig deeper. What we observed is that as we got close to the 4096 limit, 
some hosts were becoming unreachable. A modest increase in the routing 
table size made things better.

  -Arun
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