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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Fri, 25 May 2012 18:51:31 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	asharma@...com
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

From: Arun Sharma <asharma@...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.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/