interrupt storm on MSI IXP600 based motherboards

[Marat N.Afanasyev]

Dan Langille wrote:
> Pete French wrote:
>>>>>> kernel: interrupt storm detected on "irq22:"; throttling interrupt 
>>>>>> source
>>
>> ....
>>
>>> Opening the case, reading the m/b:
>>>
>>>   K9A2 Platinum MSI
>>
>>
>> I hadnt been paying much attention to this thread, but just to let you
>> know that I also saw the same thing on this machine which has an MSI 
>> 790FX
>> Platinum motherboard. It was also irq22, and I am also running amd64.
>>
>> In my case I simply disabled the onboard ethernet (which I wasnt using)
>> and the problem went away - but then I only saw the problem once, it 
>> wasnt
>> a regular occurrance. If you have an alternative ether card you can drop
>> in thn you could try that...
> 
> FYI, this box has always run off an ethernet card (fxp).  The on-board 
> NIC (re) was enabled.  After disabling, the ethernet storms persisted.
> 
> 
trouble with onboard re(4) was resolved in -CURRENT and -STABLE, but 
storms are not bound to ethernet only. storm may appear on any device. 
if any device generates enough interrupts rate, storm will arrive.

I've written about it in 
http://lists.freebsd.org/pipermail/freebsd-stable/2009-January/047644.html

so far i can say that this issue is related on MSI IXP600 based 
motherboards only. well, we should try to find out what we can do to 
resolve it.

-- 
SY, Marat