On Fri, Jun 30, 2017 at 12:06 AM, Kevin Wilson <wkevils@gmail.com> wrote: Hello, I have tried to set CONFIG_PACKET=m in kernel 4.11 and rebuilt the kernel and rebooted. I am using Ubuntu 16.04.
After reboot, the af_packet.ko kernel module is loaded: lsmod shows: af_packet 45056 2
But I cannot remove it: rmmod af_packet rmmod: ERROR: Module af_packet is in use
I want to be able to rmmod it, for adding debug printing, etc.
How can I find which applications uses it ? (So I will be able to stop them, rmmod af_packet, and then insmod it again)?
Regards, Kevin
Hello Kevin, Quick fix and short answer to your problem is to disable internet. run this in a shell/terminal: /sbin/ifconfig etho0 down Now check lsmod again, once internet is disabled the used by column which lsmod reports as af_packet being used by 2 devices/processes/whatever... will show 0. Now when you sbin/rmmod af-packet it will work and unload af_packet. Do whatever debug printing you have to.... sbin/insmod af_packet enable internet by running : /sbin/ifconfig etho0 down now check dmesg or what ever you use. Wash, rinse then repeat as needed. The answer to your question "How can I find which applications uses it ?" is something "I" have been trying to figure out for the last 9 odd years. Maybe folks with more experience can shed some light on how to go about doing this ? More experienced equates to = Valdis / Gregkh / DerRichard / Realtime localmodconfig Steve Rostedt and too many others to name.... :) Hope this helps - Aruna