I found the reason, it's my fault, I apply the splinter VLAN on wrong interface (br0). So the network loop happened, but i still don't know how to stop reference (Usage count=1).
Thanks, Kris On Fri, May 10, 2013 at 9:55 AM, Kris zhang <zhang.k...@gmail.com> wrote: > Thanks Jesse, I only put a DHCP listen ip on this port br100: > > ifconfig br100 192.188.1.10/24 up > And then i run a dnsmasq process by this listening ip. > > Also i found there is a network loop between two hosts, and both hosts are > use single NIC, and the host ip is on br0. I don't know why network loop > happened. but after i stop the loop by: > > ifconfig eth0 down > And i try to delete br100, one of the hosts is ok, another hosts is not > ok, the error syslog "kernel: unregister_netdevice: waiting for br100 to > become free. Usage count=1" constantly displayed. > > so if the ovs cannot be used in the host which only has single NIC? > (because of the network loop). > > Best regards, > Kris > > > > On Fri, May 10, 2013 at 5:24 AM, Jesse Gross <je...@nicira.com> wrote: > >> On Thu, May 9, 2013 at 5:23 AM, Kris zhang <zhang.k...@gmail.com> wrote: >> > Hi guys, >> > >> > I use ovs 1.7, and i created a br0, and then add a fake bridge br100 >> > (tag=100) on br0: >> > ovs-vsctl add-br br0 >> > ovs-vsctl add-br br100 br0 100 >> > ovs-vsctl add-port br0 eth0 >> > ovs-vsctl add-port br100 tap-test >> > >> > Now it works ok. After a while i deleted the br100: >> > ovs-vsctl del-br br100 >> > >> > There is a system log: >> > kernel: unregister_netdevice: waiting for br100 to become free. Usage >> > count=1 >> > >> > this error log cannot stop. If i try to reboot the host, the error log >> block >> > rebooting. how to fix this issue? >> >> This is a symptom of a subsystem holding a reference on a device and >> not releasing it. In many cases, OVS could be such as subsystem that >> takes references, however, in this case OVS is the owner/creator of >> the device and therefore doesn't need an extra reference. What are you >> using this device for? >> > >
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