Bug#646063: net: fix route cache rebuilds

[Jonathan Nieder <jrnieder@gmail.com>]

Hi Ben,

In October, 2011, Florian Fuessl wrote:
> Eric Dumazet <eric.dumazet@gmail.com> Fri, Oct 21, 2011 7:44 AM
>> Le vendredi 21 octobre 2011 à 01:07 +0100, Ben Hutchings a écrit :
>>> On Fri, 2011-10-21 at 00:40 +0200, Florian Fuessl wrote:

>>>> http://patchwork.ozlabs.org/patch/47114/raw/
[...]
>>> Eric, do you see any problems with this?  Would we need any more
>>> follow-up fixes?
>> [...]
>> This patch is probably safe, [...]
>>
>> But I believe another bug was fixed in 6a2bad70d546cf30
>> (ipv4: Restart rt_intern_hash after emergency rebuild )
>
> At least the Debian router runs stable now after applying the patch of Eric. :)
>
> Although there's still one message in the dmesg log after ~3 days uptime:
> spozerl:~# dmesg
> [...]
> [58018.930367] Route hash chain too long!
> [58018.930371] Adjust your secret_interval!

This is all beyond my depth.  What's the next step?  Is there some
further test Florian should try?

Thanks,
Jonathan