From: David Miller <davem@davemloft.net>
To: asharma@fb.com
Cc: eric.dumazet@gmail.com, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] net: compute a more reasonable default ip6_rt_max_size
Date: Fri, 25 May 2012 18:51:31 -0400 (EDT) [thread overview]
Message-ID: <20120525.185131.2017517041016424794.davem@davemloft.net> (raw)
In-Reply-To: <4FC0063E.8080209@fb.com>
From: Arun Sharma <asharma@fb.com>
Date: Fri, 25 May 2012 15:22:54 -0700
> On 5/25/12 1:47 PM, Eric Dumazet wrote:
>> On Fri, 2012-05-25 at 13:15 -0700, Arun Sharma wrote:
>>> The algorithm is based on ipv4 and alloc_large_system_hash().
>>>
>>
>> Why is it needed at all ?
>>
>> IPv4 has a route cache with potentially millions of entries, not IPv6.
>
> With the default size of 4096 for the ipv6 routing table, entries can
> get garbage collected and hosts could lose their default route and
> therefore lose connectivity.
>
> We actually saw it happen.
Under no circumstances should administrator configured ipv6 routes be
garbage collected, that is a bug.
next prev parent reply other threads:[~2012-05-25 22:51 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-25 20:15 [PATCH] net: compute a more reasonable default ip6_rt_max_size Arun Sharma
2012-05-25 20:26 ` David Miller
2012-05-25 20:47 ` Eric Dumazet
2012-05-25 22:22 ` Arun Sharma
2012-05-25 22:51 ` David Miller [this message]
2012-05-26 0:08 ` Arun Sharma
2012-05-26 0:11 ` David Miller
2012-05-26 0:44 ` Arun Sharma
2012-05-26 3:39 ` Eric Dumazet
2012-05-26 4:17 ` Eric Dumazet
2012-05-27 3:54 ` Arun Sharma
2012-05-27 13:18 ` Eric Dumazet
-- strict thread matches above, loose matches on Subject: below --
2012-05-30 23:50 Lubashev, Igor
2012-06-04 19:04 ` Lubashev, Igor
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