[ath9k-devel] modprobe ath9k == BUG: unable to handle kernel NULL pointer dereference at 000001dc

[Joseph Cheek <joseph@cheek.com>]

I've been trying git tip for a week and no more kernel OOPS!  great job,
thanks!

I also did NOT have to change IEEE_MONITORING_INTERVAL to stay
connected.  *But* I still lose connectivity for several seconds during a
large file transfer (most often transferring 50M or more via scp or
rsync -e ssh).

Joseph Cheek

Joseph Cheek wrote:
> ok.  I just got a repro on 2.6.27.11 with compat-wireless-2008-12-31. 
> it appears to occur when i bring down the interface, rmmod ath9k, and
> then modprobe ath9k while I am trying to rsync from or to the box.  I
> bounce the interface like this often when I lose transmission for
> several seconds at a time.  most of the time it recovers ok, but
> sometimes it doesn't.
>
> i'll try git tip on monday.
>
> Thanks!
>
> Joseph
>
> Luis R. Rodriguez wrote:
>   
>> On Thu, Jan 22, 2009 at 11:19:00AM -0800, Joseph Cheek wrote:
>>   
>>     
>>> I just got a repro of this on 2.6.27.12 with compat-wireless
>>> 2009-01-19.  i'm going back to 2.6.27.11 with compat-wireless 2008-12-31
>>> to see if it is more stable (I never got the bug on that one).
>>>
>>> here are the config_debug options i had on for this last strace.  please
>>> let me know what other options you would like me to turn on so i can
>>> make the trace more useful.
>>>
>>> thanks!
>>>
>>> Joseph Cheek
>>>
>>> CONFIG_DEBUG_KERNEL=y
>>> CONFIG_DEBUG_PREEMPT=y
>>> CONFIG_DEBUG_BUGVERBOSE=y
>>> CONFIG_DEBUG_INFO=y
>>> CONFIG_DEBUG_MEMORY_INIT=y
>>> CONFIG_DEBUG_PAGEALLOC=y
>>>     
>>>       
>> These are good, CONFIG_DEBUG_INFO=y is what I was looking for too.
>> Not sure why you don't get what I expect. Try using ksymoops then,
>> or you can also just recompile using wireless-testing kernel directly:
>>
>> http://wireless.kernel.org/en/developers/Documentation/git-guide
>>
>> This has the latest RC kernel + all the wireless stuff we have queued up
>> for 2.6.30 (what compat-wireless picks up).
>>
>>   Luis
>>
>>   
>>     
> _______________________________________________
> ath9k-devel mailing list
> ath9k-devel at lists.ath9k.org
> https://lists.ath9k.org/mailman/listinfo/ath9k-devel
>