Hi All,
When i am trying to delete an interface from the application, while traffic is flowing through it, kernel throws the message
unregister_netdevice: waiting for eth0 to become free. Usage count = 4
which means network device usage counter is more that zero and there are 4 references of this device still active, therefore the networking subsystem of the kernel
defers it, to become the usage counter 0.
Can somebody let me know what are the operations/ events increases the reference count of any network device.
I looked in to the kernel code and found that a call to
"dev_hold" increases the refrence count and
"dev_put" decreases this.
thanks,
Vishwas S
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