Re: Possibly SATA related freeze killed networking and RAID

[Robert Hancock]

Phillip Susi wrote:
> Tejun Heo wrote:
> > Agreed.  Nobody cared on ATA controllers is usually very effective at
> > taking the whole machine down.  Is there any reason why we don't turn on
> > irqpoll on turned off IRQs automatically?
>
> Why does a single spurious interrupt cause it to be shut down?  I can 
> see if the interrupt is stuck on and keeps interrupting constantly, but 
> if it's just the occasional spurious interrupt, why not just ignore it 
> and move on?

I'm not certain offhand, but I think there may be such a threshold. 
However, an occasional spurious interrupt isn't likely. For a 
level-triggered interrupt, an unhandled interrupt will keep interrupting 
forever since nobody knows how to clear it (until we decide to disable 
the IRQ entirely).

--
Robert Hancock      Saskatoon, SK, Canada
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Home Page: http://www.roberthancock.com/

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