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

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Message-ID: <1338005867.10135.10.camel@edumazet-glaptop>
Date:	Sat, 26 May 2012 06:17:47 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Arun Sharma <asharma@...com>
Cc:	David Miller <davem@...emloft.net>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net: compute a more reasonable default ip6_rt_max_size

On Sat, 2012-05-26 at 05:39 +0200, Eric Dumazet wrote:

> But your patch is not a  "modest increase", so whats the deal ?
> 
> A modest increase would be 8192 instead of 4096, regardless of RAM size.
> 
> 

More over, a boot parameter to tweak it is absolutely not needed

sysctl -w net.ipv6.route.max_size=16384

or

echo 16384 >/proc/sys/net/ipv6/route/max_size

IPv4 has to allocate a hash table at boot time, and this hash table is
not resized. Thus some really special purpose machines need a boot
param.




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