Messages in this thread | ![/](/images/icornerl.gif) | | From | Florian Zwoch <> | Subject | Re: why does netfilter make upload very slow? (was: Re: e1000 -> 82540EM on linux 2.6.0-test[45] very slow in one direction) | Date | Wed, 15 Oct 2003 10:28:50 +0200 |
| |
Harald Welte wrote: >>Would somebody like to explain why netfilter (in kernel, but not in use) >>makes upload go very slow? I am by no means a network guru, but eager to >>learn :-) > > > let's get this straight. There are five possible cases > > a) CONFIG_NETFILTER disabled. you won't even have the netfilter hooks > in the network stack (so certainly no netfilter-using modules loaded)
no problem
> b) CONFIG_NETFILTER enabled, but _no_ modules (iptable_filter, > ip_conntrack, ...) attached to the netfilter hook
no problem
> c) CONFIG_NETFILTER enabled and iptable_filter.o (which pulls ip_tables.o) > loaded, NO RULES in the table
no problem
> d) CONFIG_NETFILTER enabled and iptable_filter.o (which pulls ip_tables.o) > loaded, RULES in the table
no problem (as long as i dont load any rules that require ip_conntrack)
> e) CONFIG_NETFILTER enabled and ip_conntrack.o loaded, iptable_filter > loaded or not, rules or not
*boink*
whenever i try to load ip_conntrack the nic performance drops from 5mb/s to 200k/s.
still using 2.6.0-test6.
regards, Florian
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| ![\](/images/icornerr.gif) |