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Date: Tue, 31 May 2011 11:19:13 +0200
From: Jiri Pirko <jpirko@...hat.com>
To: WeipingPan <panweiping3@...il.com>
Cc: "open list:NETWORKING [GENERAL]" <netdev@...r.kernel.org>
Subject: Re: netxen_nic: unregister_netdevice error
So apparently this does not occur on 3.0.0-rc1
Tue, May 31, 2011 at 08:15:24AM CEST, panweiping3@...il.com wrote:
>hi,
>
>When test bonding broadcast mode I met a problem.
>modprobe -r bonding will fail after I ping broadcast address.
>
>I find that the problem only shows up when I use netxen_nic driver.
>When use ixgbe and bn2x2 driver, no problem occurs.
>
>I use RHEL 6.2, kernel 2.6.32-131.0.15.el6.i686,
>Can anybody confirm this bug using 2.6.39 or upstream ?
>
>many thanks
>Weiping Pan
>
>
>The test script is followed.
>
>#test script start
>#!/bin/bash
>
>NETWORK_CARD0=eth1
>NETWORK_CARD1=eth2
>
>
>function broadcast_test()
>{
> modprobe bonding mode=broadcast miimon=100
> ifconfig bond0 192.168.8.2 netmask 255.255.255.0 up
> ifconfig $NETWORK_CARD0 down
> ifconfig $NETWORK_CARD1 down
> echo +$NETWORK_CARD0 > /sys/class/net/bond0/bonding/slaves
> echo +$NETWORK_CARD1 > /sys/class/net/bond0/bonding/slaves
> ping 192.168.8.255 -b -c 10
> modprobe -r bonding
>}
>
># main
>echo 0 >/proc/sys/net/ipv4/icmp_echo_ignore_broadcasts
>modprobe -r bonding
>
>for i in `seq 1 10`
>do
> echo "*******************"
> echo "***iteration$i*****"
> echo -e "*******************\n\n"
> broadcast_test
>done
>#test script end
>
>
>Some information is followed.
>[root@...magnycours-01 ~]# uname -a
>Linux hp-magnycours-01.rhts.eng.bos.redhat.com
>2.6.32-131.0.15.el6.i686 #1 SMP Tue May 10 15:42:28 EDT 2011 i686
>i686 i386 GNU/Linux
>
>[root@...magnycours-01 ~]# cat /etc/redhat-release
>Red Hat Enterprise Linux Server release 6.1 (Santiago)
>
>[root@...magnycours-01 ~]# lspci |grep Ethernet
>04:00.0 Ethernet controller: NetXen Incorporated NX3031 Multifunction
>1/10-Gigabit Server Adapter (rev 42)
>04:00.1 Ethernet controller: NetXen Incorporated NX3031 Multifunction
>1/10-Gigabit Server Adapter (rev 42)
>04:00.2 Ethernet controller: NetXen Incorporated NX3031 Multifunction
>1/10-Gigabit Server Adapter (rev 42)
>04:00.3 Ethernet controller: NetXen Incorporated NX3031 Multifunction
>1/10-Gigabit Server Adapter (rev 42)
>
>[root@...magnycours-01 ~]# lsmod |grep net
>netxen_nic 83405 0
>
>[root@...magnycours-01 ~]# ifconfig -a
>eth0 Link encap:Ethernet HWaddr 1C:C1:DE:EE:28:F0
> inet addr:10.16.64.212 Bcast:10.16.71.255 Mask:255.255.248.0
> inet6 addr: fec0:0:a10:4000:1ec1:deff:feee:28f0/64 Scope:Site
> inet6 addr: fe80::1ec1:deff:feee:28f0/64 Scope:Link
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> RX packets:13417 errors:0 dropped:0 overruns:0 frame:0
> TX packets:713 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:1000
> RX bytes:1110663 (1.0 MiB) TX bytes:90272 (88.1 KiB)
> Interrupt:93
>
>eth1 Link encap:Ethernet HWaddr 1C:C1:DE:EE:28:F1
> BROADCAST MULTICAST MTU:1500 Metric:1
> RX packets:0 errors:0 dropped:0 overruns:0 frame:0
> TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:1000
> RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
> Interrupt:97
>
>eth2 Link encap:Ethernet HWaddr 1C:C1:DE:EE:28:F2
> BROADCAST MULTICAST MTU:1500 Metric:1
> RX packets:0 errors:0 dropped:0 overruns:0 frame:0
> TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:1000
> RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
> Interrupt:101
>
>eth3 Link encap:Ethernet HWaddr 1C:C1:DE:EE:28:F3
> BROADCAST MULTICAST MTU:1500 Metric:1
> RX packets:0 errors:0 dropped:0 overruns:0 frame:0
> TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:1000
> RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
> Interrupt:105
>
>lo Link encap:Local Loopback
> inet addr:127.0.0.1 Mask:255.0.0.0
> inet6 addr: ::1/128 Scope:Host
> UP LOOPBACK RUNNING MTU:16436 Metric:1
> RX packets:18 errors:0 dropped:0 overruns:0 frame:0
> TX packets:18 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:0
> RX bytes:10557 (10.3 KiB) TX bytes:10557 (10.3 KiB)
>
>
>[root@...magnycours-01 ~]# ./test_bonding_broadcast.sh |tee log
>*******************
>***iteration1*****
>*******************
>
>
>WARNING: pinging broadcast address
>PING 192.168.8.255 (192.168.8.255) 56(84) bytes of data.
>64 bytes from 192.168.8.2: icmp_seq=1 ttl=64 time=0.041 ms
>64 bytes from 192.168.8.2: icmp_seq=2 ttl=64 time=0.029 ms
>64 bytes from 192.168.8.2: icmp_seq=3 ttl=64 time=0.027 ms
>64 bytes from 192.168.8.2: icmp_seq=4 ttl=64 time=0.026 ms
>64 bytes from 192.168.8.2: icmp_seq=5 ttl=64 time=0.030 ms
>64 bytes from 192.168.8.2: icmp_seq=6 ttl=64 time=0.024 ms
>64 bytes from 192.168.8.2: icmp_seq=7 ttl=64 time=0.024 ms
>64 bytes from 192.168.8.2: icmp_seq=8 ttl=64 time=0.023 ms
>64 bytes from 192.168.8.2: icmp_seq=9 ttl=64 time=0.024 ms
>64 bytes from 192.168.8.2: icmp_seq=10 ttl=64 time=0.023 ms
>
>--- 192.168.8.255 ping statistics ---
>10 packets transmitted, 10 received, 0% packet loss, time 9000ms
>rtt min/avg/max/mdev = 0.023/0.027/0.041/0.005 ms
>
>Message from syslogd@...magnycours-01 at May 25 04:07:22 ...
> kernel:unregister_netdevice: waiting for bond0 to become free. Usage
>count = 1
>
>Message from syslogd@...magnycours-01 at May 25 04:07:33 ...
> kernel:unregister_netdevice: waiting for bond0 to become free. Usage
>count = 1
>
>
>[root@...magnycours-01 ~]# dmesg
>Ethernet Channel Bonding Driver: v3.6.0 (September 26, 2009)
>bonding: MII link monitoring set to 100 ms
>ADDRCONF(NETDEV_UP): bond0: link is not ready
>bonding: bond0: Adding slave eth1.
>bonding: bond0: enslaving eth1 as an active interface with a down link.
>netxen_nic: eth1 NIC Link is up
>bonding: bond0: Adding slave eth2.
>bonding: bond0: enslaving eth2 as an active interface with a down link.
>netxen_nic: eth2 NIC Link is up
>bonding: bond0: link status definitely up for interface eth1.
>bonding: bond0: link status definitely up for interface eth2.
>ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready
>bond0: IPv6 duplicate address fe80::1ec1:deff:feee:28f1 detected!
>bonding: bond0: released all slaves
>unregister_netdevice: waiting for bond0 to become free. Usage count = 1
>unregister_netdevice: waiting for bond0 to become free. Usage count = 1
>unregister_netdevice: waiting for bond0 to become free. Usage count = 1
>unregister_netdevice: waiting for bond0 to become free. Usage count = 1
>
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