On Tue, 10 Jun 2003, David S. Miller wrote: > Actually, that's a good idea, if someone if brave just rip out > fib_validate_source (just don't call it, should work for valid > traffic) and see what happens :) Looking at Simon's profile numbers, these seem to contribute a lot more than fib_validate_source: 1237 ipt_route_hook 19.3281 3120 do_gettimeofday 21.6667 8299 ip_packet_match 24.6994 8031 fib_lookup 25.0969 1877 fib_rule_put 29.3281 What's the do_gettimeofday for? Is that just a bogus one that shows up for kernel profiling (I can recall using the profiling tool quantify had a similar problem of showing gettimeofday calls that it was doing on its own). I traced back the fib_lookup to ip_forward_finish, which seems to only call ip_forward_options when there's IP options (go figure!), which would make sense for a SYN packet (juno). What I can't think of is why we'd want to have special routing considerations for TCP SYN packets (and other IP packets with options set). -Ralph - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
