[LARTC] HTB policing affects shaping performance? Please, help.

[Bc.Slavomir Danas <danas@ctn.sk>]

This is my simple situation:
I want to policy download and shape upload going through my router.
It has two interfaces: eth0 (10.4.10.222/24 connected to LAN) and eth1 (172.16.0.1/24 connected to my laptop).
My setup:
[eth1]
tc qdisc add dev eth1 root handle 1: htb default 999
tc qdisc add dev eth1 parent 1: classid 1:1 htb rate 1Mbit
tc filter add dev eth1 protocol ip parent 1:0 prio 1 u32 match ip dst 172.16.0.2 flowid 1:1
[eth0]
tc qdisc add dev eth0 root handle 1: htb default 999
tc qdisc add dev eth0 parent 1: classid 1:1 htb rate 1Mbit
tc filter add dev eth0 protocol ip parent 1:0 prio 1 u32 match ip src 172.16.0.2 flowid 1:1

I'm trying to access shared folders (samba) on ip 10.4.10.10 from my laptop with ip 172.16.0.2.
Everything works as expected when downloading or uploading (correctly shaped and policed at 1Mbit). But when I try to download and upload at the same time, my speed drops down rapidly on both download and upload (approx. 350kbit and 550kbit). I tried to replace tc filter with iptables CLASSIFY but with the same result.
What is the correct approach when configuring separate queues with guaranteed rate without affecting each other?

Running 2.6.19-gentoo-r5, iptables-1.3.5, iproute2-ss061214

Thanx in advance.

Slavius.
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