Possible problems with kernel 2.4.21

[I.R. van Dongen]

Dear tinc-users,

Some days ago, my colleage asked me to help him with his recent problems
concerning tinc.
His machine refused to reboot, and complained this to syslog:

Jul  1 19:51:04 gompie kernel: unregister_netdevice: waiting for testlan to
beco
me free. Usage count = 2
Jul  1 19:51:44 gompie last message repeated 4 times
Jul  1 19:52:54 gompie last message repeated 7 times
Jul  1 19:53:54 gompie last message repeated 6 times
Jul  1 19:54:14 gompie last message repeated 2 times
<snip 30 more lines>

At first we thought it might be a tinc problem, since "testlan" is a tinc
device, but we soon realized that it must be a kernel problem.

I reproduced this bug on another machine like this:

It has a working 2.4.20 kernel.
Downloaded a 2.4.21 kernel.
copyed .config, did make oldconfig
answered all new questions No.
rebooted

No problem so far.
Then I rebooted again.

I have to go to the colo tomorrow to press the resetbutton of this machine,
it pings....but does nothing more.
I would recommend against using kernel 2.4.21 on boxes that have tinc at
this time.

Greetings,

Ivo van Dongen
Sysadmin
Int.Sg. "Het Westland" ("Westland" educational centre
NL)
____________________________________________________________________
Webmail.hetisw.nl

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