Bug#321902: fails to rmmod usbnet

[Horms <horms@debian.org>]

tag 321902 +moreinfo
tag 321902 +upstream
severity 321902 important
thanks

On Mon, Aug 08, 2005 at 01:30:48PM +0800, Ф???? Faris Xiao wrote:
> Package: kernel-image-2.6.8-2-686
> Version: 2.6.8-16
> Severity: grave
> Justification: renders package unusable
> 
> I has a usb cable modem.
> My usb cable modem use kernel driver module usbnet.
> 
> When I am using the modem,I execute the command:
> 
> rmmod usbnet
> 
> The model usbnet can not be removed.
> Also the process which execute the command can not be finished,it 
> consume the CPU 99% persistent,over and over.Even I can't use
> 
> kill -9 "process id"
> 
> to terminal it ,only reboot the whole computer.
> 
> The following is the dmesg output about my usb cable modem:

Basically this means that the process is exceuting some code
in the kernel, and that code is stuck, perhaps in a loop,
perhaps waiting for a lock, but regardless stuck.
You can't kill a process until it is back in user-space,
and if this doesn't happen, you have to reboot :(

Is it possible to get the dmsg output when this occurs?
That might help track down the problem, but to be honest,
its likely quite hard to narrow this down to a simple fix
that is appropriate for inclusion in 2.6.8, which is
now in maintenane mode for sarge. Your best option
is probably to try linux-image-2.6.12-1-686 from unstable.

Thanks

-- 
Horms