From mboxrd@z Thu Jan  1 00:00:00 1970
From: Florian Westphal <fw@strlen.de>
Subject: Re: [PATCH v3 kernel 16/29] add permanent byte/packet format
 capability to nfacct
Date: Wed, 10 Jul 2013 22:00:24 +0200
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Cc: netfilter-devel@vger.kernel.org, pablo@netfilter.org
To: Michael Zintakis <michael.zintakis@googlemail.com>
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Michael Zintakis <michael.zintakis@googlemail.com> wrote:
> * add a 'fmt' variable to each nfacct object, allowing a permanent packets
> and bytes formatting to be stored. The two packet and byte formats are
> independent of each other.

Every other in-kernel byte counter (that I can think of) is a plain u64.

It might help if you'd explain why this is necessary.