interrupt storm on MSI IXP600 based motherboards

[Dan Langille]

Victor Balada Diaz wrote:
> On Wed, Jan 21, 2009 at 07:22:06PM +0300, Marat N.Afanasyev wrote:
>>>> 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.
>>> Yes, I just got another storm, on my ATA controller this time. Ah
>>> well, so much for the idea of disabling unneeded devices!
>>>
>>> -pete.
>>>
>> it's a kind of magic, really. I built a new kernel with KDB and DDB and 
>> after 1 day, 13:15 I'm still waiting for storm to arrive. And I added
>> hw.acpi.osname="Linux" to /boot/loader.conf.
> 
> Try doing lots of IO and you will get the problem soon. You might
> want to try:
> 
> while true; do dd if=/dev/zero of=BAH bs=1M count=1024; sync; done

FWIW, last night I changed the address of the comm port IO in my BIOS. 
Then I ran the Bacula regression test suite (lots of IO).  For my 
machine, once the interrupt storm starts, it continues.  I do not know 
if that happens to everyone.

Since changing the address, I have had no interrupt storms. I have been 
running the above IO loop for about ten minutes.

No storm yet (knock on wood).

-- 
Dan Langille

BSDCan - The Technical BSD Conference : http://www.bsdcan.org/
PGCon  - The PostgreSQL Conference:     http://www.pgcon.org/