netdev - Re: Tc bug (kernel crash) more info

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Date:	Fri, 31 Aug 2007 11:04:21 +0400
From:	Badalian Vyacheslav <slavon@...telecom.ru>
To:	Jarek Poplawski <jarkao2@...pl>, netdev@...r.kernel.org
Subject: Re: Tc bug (kernel crash) more info


I try you patch. Also i try add more debug options to kernel. I catch 
(BUG: spinlock lockup on CPU#3, tc/6403, f742e200)
All info in file. Ready for next patch ;)

>> Jarek Poplawski ??????????:
>>     
> ...
>   
>>> On the other hand disabling local interrupts shouldn't be enough here,
>>> so it's really strange... Did you get this remotely? Are you sure LOC
>>> only? (Anyway this 2.6.23-rc4 should be interesting.)
>>>       
> ...
>   
>> Only LOC changes... icmp answer = 50-70ms... after 1-2 hours traffic 
>> level is down and SI on CPU0 and CPU2 change to above 50%. ksoftirqd 
>> free CPU usage. I have this bug 3-4 times in week. If you need info what 
>> i can see only in bug still processing - i may try get this info for you.
>>     
>
> Any additional info could be helpful. I'm not sure if all these
> computers do similar htb processing, or it's another problem?
> As I've written before htb before 2.6.23-rc1 has a problem with
> timer lockup during qdisc_destroy, so softirqs would be hit.
> If it's htb's fault 2.6.23-rc4 or my testing patch should help.
>
> I try to find in htb code another weak points. BTW, if during
> such lockups any processes are killed 'by hand' etc., without
> restarting the whole system, please let us know.
>
>   
>> maybe help:
>>
>> 1U server INTEL, mb se7501w2
>>
>> nat-new ~ # lspci
>>     
>
> lspci -v (or -vv should be more usable - but with dmesg at least)
>
> Jarek P.
>
>
>   


View attachment "bug.txt" of type "text/plain" (15945 bytes)