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<DIV dir=ltr align=left><SPAN class=420223504-05122007><FONT face=Arial
size=2>Oh, </FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=420223504-05122007><FONT face=Arial
size=2>kernel version 2.6.23, since I forgot to mention it.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=420223504-05122007><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=420223504-05122007><FONT face=Arial
size=2>Leigh.</FONT></SPAN></DIV><BR>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> lartc-bounces@mailman.ds9a.nl
[mailto:lartc-bounces@mailman.ds9a.nl] <B>On Behalf Of </B>Leigh
Sharpe<BR><B>Sent:</B> Wednesday, 5 December 2007 3:37 PM<BR><B>To:</B>
lartc@mailman.ds9a.nl<BR><B>Subject:</B> [LARTC] Adding qdiscs crashes
kernel??<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV><SPAN class=464285603-05122007><FONT face=Arial size=2>Hi
all,</FONT></SPAN></DIV>
<DIV><SPAN class=464285603-05122007><FONT face=Arial size=2> I'm having
some problems setting up qdiscs on a bridge.The config looks a little like
this:</FONT></SPAN></DIV>
<DIV><SPAN class=464285603-05122007><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=464285603-05122007><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=464285603-05122007><FONT face=Arial size=2>ifconfig ifb0
up # Bring up the IFB for this
bridge.</FONT></SPAN></DIV>
<DIV><SPAN class=464285603-05122007><FONT face=Arial size=2>tc qdisc add dev
eth2 ingress<BR>tc qdisc add dev eth3 ingress<BR>tc qdisc add dev ifb0 root
handle 1:0 cbq bandwidth 100Mbit avpkt 1000 cell 8<BR># Raw qdiscs on each
bridge port<BR>tc qdisc add dev eth2 root handle 1:0 cbq bandwidth 100Mbit avpkt
1000 cell 8<BR>tc qdisc add dev eth3 root handle 1:0 cbq bandwidth 100Mbit avpkt
1000 cell 8<BR></FONT></SPAN></DIV>
<DIV><SPAN class=464285603-05122007><FONT face=Arial size=2>tc filter add dev
eth2 parent 1: protocol 0x8100 prio 5 u32 match u16 3000 0x0fff at 0 flowid 1:1
action ipt -j MARK --or-mark 0x01000000 # mark packets for VLAN 3000.<BR>tc
filter add dev eth3 parent 1: protocol 0x8100 prio 5 u32 match u16 3000 0x0fff
at 0 flowid 1:1 action ipt -j MARK --or-mark 0x01000000 # mark packets for
VLAN 3000.</FONT></SPAN></DIV>
<DIV><SPAN class=464285603-05122007><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=464285603-05122007><FONT face=Arial size=2>tc class add dev
eth2 parent 1:0 classid 1:1 cbq bandwidth 100Mbit rate 2000Kbit weight 200Kbit
prio 1 allot 1514 cell 8 maxburst 20 avpkt 1000 bounded
isolated # 2000 Kbit rate limit on entry
point.<BR>tc class add dev eth3 parent 1:0 classid 1:1 cbq bandwidth 100Mbit
rate 2000Kbit weight 200Kbit prio 1 allot 1514 cell 8 maxburst 20 avpkt
1000 bounded isolated # 2000 Kbit rate
limit on entry point.<BR></FONT></SPAN><SPAN class=464285603-05122007><FONT
face=Arial size=2></FONT></SPAN></DIV>
<DIV><SPAN class=464285603-05122007><FONT face=Arial size=2>tc qdisc add dev
eth2 parent 1:1 handle 2: cbq bandwidth 100Mbit avpkt 1000 cell 8<BR>tc
qdisc add dev eth3 parent 1:1 handle 2: cbq bandwidth 100Mbit avpkt 1000
cell 8</FONT></SPAN></DIV>
<DIV><FONT face=Arial size=2>tc class add dev eth2 parent 2:0 classid 2:1 cbq
bandwidth 100Mbit rate 2000Kbit weight 200Kbit prio 2 allot 1514 cell 8 maxburst
20 avpkt 1000 sharing<BR></FONT><FONT face=Arial size=2>tc filter add dev
eth2 parent 2:0 protocol 0x8100 prio 2 u32 match u16 3000 0x0fff at 0 flowid 2:1
action ipt -j MARK --or-mark 0x00100000 </FONT></DIV>
<DIV><FONT face=Arial size=2>tc qdisc add dev eth2 parent 2:1 handle 3: cbq
bandwidth 100Mbit avpkt 1000 cell 8 </FONT></DIV>
<DIV><FONT face=Arial size=2>tc filter add dev eth2 parent 3:0 protocol 0x8100
prio 4 u32 match u32 0 0 flowid
3:3
# Traffic class 3 - catchall. Don't MARK further.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=464285603-05122007>(There's lot's more,
mostly a repeat of the above with different criteria.)</SPAN></FONT></DIV>
<DIV><SPAN class=464285603-05122007><FONT face=Arial size=2>When I first boot
the box, and apply the traffic shaping before any traffic flows, all is fine.
However, if I apply this same config whilst the bridge is passing lots of
traffic, it completely crashes the box. Everything freezes, I don't even get a
kernel panic message on the console. Nothing responds and the only way to
recover is by a power-cycle.</FONT></SPAN></DIV>
<DIV><SPAN class=464285603-05122007><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=464285603-05122007><FONT face=Arial size=2>If I take the link
down on the ethernet port (with ip link set ethx down), apply the configs, and
then bring it back up again, all is OK. Obviously, though, this isn't really
acceptable.</FONT></SPAN></DIV>
<DIV><SPAN class=464285603-05122007><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=464285603-05122007><FONT face=Arial size=2>It always crashes
immediately after a 'tc qdisc add...' line, but not always in the same place.
Are there any known issues with adding qdiscs whilst traffic is being queued on
it?</FONT></SPAN></DIV>
<DIV><SPAN class=464285603-05122007><FONT face=Arial size=2>I've also tried it
using HTB instead of CBQ, and I get the same results.</FONT></SPAN></DIV>
<DIV><SPAN class=464285603-05122007><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=464285603-05122007><FONT face=Arial size=2>Anybody got any
other ideas as to what might be going on?</FONT></SPAN></DIV>
<DIV><SPAN class=464285603-05122007><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV align=left>
<DIV align=left><FONT face=Arial
size=2>Regards,<BR>
Leigh</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>Leigh Sharpe<BR>Network Systems Engineer<BR>Pacific
Wireless<BR>Ph +61 3 9584 8966<BR>Mob 0408 009 502</FONT></DIV>
<DIV><FONT face=Arial size=2>Helpdesk 1300 300 616<BR>email <A
title=mailto:lsharpe@pacificwireless.com.au
href="blocked::mailto:lsharpe@pacificwireless.com.au">lsharpe@pacificwireless.com.au</A><BR>web
<A title=http://www.pacificwireless.com.au/
href="blocked::http://www.pacificwireless.com.au/">www.pacificwireless.com.au</A></FONT></DIV></DIV>
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