From mboxrd@z Thu Jan  1 00:00:00 1970
From: Patrick McHardy <kaber@trash.net>
Subject: Re: Transmit mark during connection destruction event
Date: Tue, 29 Jan 2008 15:36:21 +0100
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Cc: Eric Leblond <eric@inl.fr>, netfilter-devel@vger.kernel.org
To: Pablo Neira Ayuso <pablo@netfilter.org>
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Pablo Neira Ayuso wrote:
> Patrick McHardy wrote:
>
>> I'm also sure you could decrease overhead far more by choosing a proper
>> allocation size without affecting functionality thats apparently useful
>> for some people.
> 
> Please, elaborate this a bit.


ctnetlink currently allocates skb of NLMSG_GOODSIZE size, which is
4k on most architectures, but the actual messages are far smaller.
When more than 50% of the skb are unused, af_netlink reallocates
the skb, copying the entire data.