conntrack and kernel log

[Eicke Friedrich <tady@gmx.net>]

Hi,

comparing the kernel messages of two linux boxes I found something 
that I don't understand. Maybe someone can explain it to me?

First box, Pentium 133, 64MB RAM CONNMARK installed:
kernel: ip_conntrack version 2.1 (512 buckets, 4096 max) - 156 bytes 
per conntrack

Second box: Dual PentiumII 266, 192MB RAM, no CONNMARK installed:
kernel: ip_conntrack version 2.1 (1536 buckets, 12288 max) - 292 bytes 
per conntrack

How comes that the size per conntrack is at the first box smaller even 
though CONNMARK is installed? I mean it uses some bytes more per entry 
for the mark= field? Is it due to two CPU's? Sorry for this newbie 
question but googlin' did not gave me an answer.

Thanks for any comments,
Eicke.