Mirko Parthey wrote:

On Mon, Jan 31, 2005 at 05:22:02PM +0100, wrote:


My Debian machine hangs during shutdown, with messages like this:
unregister_netdevice: waiting for br0 to become free. Usage count = 1

I narrowed it down to the command
 # brctl delbr br0
which does not return in the circumstances shown below.

The problem is reproducible with both 2.6.11-rc2 from kernel.org and the
Debian kernel-image-2.6.10-1-686.
[...]



The problem was introduced between 2.6.8.1 and 2.6.9, and it is still present in 2.6.11-rc2-bk9.

Mirko
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Jep it appears in 2.6.8 and above. I don't know the process who's using it:

Before shutdown:
 PID TTY          TIME CMD
   1 ?        00:00:00 init
   2 ?        00:00:00 ksoftirqd/0
   3 ?        00:00:00 events/0
   4 ?        00:00:00 khelper
   9 ?        00:00:00 kthread
  19 ?        00:00:00 kacpid
  17 ?        00:00:00 vesafb
 100 ?        00:00:00 kblockd/0
 164 ?        00:00:00 pdflush
 165 ?        00:00:00 pdflush
 166 ?        00:00:00 kswapd0
 167 ?        00:00:00 aio/0
 168 ?        00:00:00 jfsIO
 169 ?        00:00:00 jfsCommit
 170 ?        00:00:00 jfsSync
 171 ?        00:00:00 xfslogd/0
 172 ?        00:00:00 xfsdatad/0
 173 ?        00:00:00 xfsbufd
 774 ?        00:00:00 kseriod
 862 ?        00:00:00 ata/0
 882 ?        00:00:00 kcryptd/0
 883 ?        00:00:00 kmirrord/0
 887 ?        00:00:00 xfssyncd
 939 ?        00:00:00 udevd
1061 ?        00:00:00 devfsd
1242 ?        00:00:00 khubd
1616 ?        00:00:00 syslog-ng
2562 ?        00:00:00 khpsbpkt
2646 ?        00:00:00 knodemgrd_0
3987 ?        00:00:00 crond
4027 tty2     00:00:00 agetty
4028 tty3     00:00:00 agetty
4029 tty4     00:00:00 agetty
4030 tty5     00:00:00 agetty
4031 tty6     00:00:00 agetty
4473 tty1     00:00:00 bash
4553 tty1     00:00:00 ps

And my System can't shutdown because of this bug. Currently disabling this checking function seems to be the only solution (see my diff).

Matthias-Christian Ott
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