Thanks flaviof, As your email thread, I can't use the option 
"force-reload-kmod" to uninstall the openvswitch.ko.
The error was always shown " modprobe: FATAL: Module openvswitch is in use."

My operation is as below:
1. insmod openvswitch.ko
        modprobe openvswitch
2. start the ovsdb-server:
   ovsdb-server --remote=punix:/usr/local/var/run/openvswitch/db.sock 
--bootstrap-ca-cert=db:Open_vSwitch,SSL,ca_cert --pidfile --detach
3. start ovs-vswitchd
        ovs-vswitchd --pidfile --detach
4. add a ovs bridge
        ovs-vsctl add-br br0
5. remove this bridge
        ovs-vsctl del-br br0

until this step3, I can successful uninstall openvswitch.ko and no error shown 
with command: modprobe -r openvswitch
but, step 5, the error " modprobe: FATAL: Module openvswitch is in use." is 
shown when I want to remove the kernel mode of openvswitch, in spite of 
stopping ovs with "pkill ovs".

I have found the virtual interface named "ovs-system" with command " ifconfig 
-a", I guess it is the key of this issue. So what can I do to remove the 


Zhiwei xiong

发件人: Flavio Fernandes [] 
发送时间: 2016年10月10日 22:26
收件人: Justin Pettit <>
抄送: xiongzhiwei <>;
主题: Re: [ovs-discuss] can't remove openvswitch.ko with "modprobe -r openvswitch 

> On Oct 10, 2016, at 2:05 AM, Justin Pettit <> wrote:
> You might check the log files.  You might also check "lsmod" and see if 
> there's any dependency on it.

Also, see if this is related to a known issue that was discussed here [1].
I never got look at the code that Jesse suggested [2]; sorry!

-- flaviof


> --Justin
>> On Oct 9, 2016, at 2:10 AM, xiongzhiwei <> wrote:
>> Hi all, 
>> I have updated my ovs from 2.3.2 to 2.5, I want to remove the openvswitch.ko 
>> with “modprobe –r openvswitch”, but it doesn’t work.
>> For the ovs 2.3.2, there is no this problem.
>> Who can tell me how to uninstall the ovs?
>> Thanks and regards
>> Zhiwei Xiong
>> ----------<image001.png>----------
>> 熊志伟 Xiong Zhiwei
>> Mob:(+86) 186-1840-0861
>> 北京佰才邦技术有限公司Baicells Technologies Co. Ltd.
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