With recent 2.6 kernels, the command brctl delbr br0 hangs during shutdown, and the kernel prints this message again and again: unregister_netdevice: waiting for br0 to become free. Usage count = 1 I was able to reproduce this problem with several kernels between (and including) 2.6.9-rc1 and 2.6.11-rc2-bk9. I haven't tried later versions than 2.6.11-rc2-bk9 yet. 2.6.8.1-bk2 still works fine. My .config was taken from the Debian kernel-image-2.6.10-1-686 package, adapted to the kernel.org kernels and the processor type set to Pentium Classic. I can email it on request. This script should reproduce the problem reliably: #!/bin/bash set -x mount proc -t proc /proc ifconfig lo 127.0.0.1 brctl addbr br0 modprobe e100 # also works with 3c5x9 brctl addif br0 eth0 ifconfig br0 192.168.1.1 ifconfig eth0 up sleep 5 ifconfig lo down lsmod | grep bridge brctl delif br0 eth0 ifconfig br0 down brctl delbr br0 To run it, I booted with init=/bin/bash to make sure the distribution's startup scripts don't interfere (although it might work anyway). I already reported this to the linux-kernel list, since I couldn't tell whether this is a bug in the bridging code or somewhere else. On second reading of REPORTING-BUGS, I probably should have sent it here first. For reference, these are my postings to linux-kernel: http://www.ussg.iu.edu/hypermail/linux/kernel/0501.3/2222.html http://www.ussg.iu.edu/hypermail/linux/kernel/0502.0/0139.html Please let me know if you need any further information, and please Cc me on replies, since I am not subscribed to the bridge list. Mirko
