Re: Possibly SATA related freeze killed networking and RAID

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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).

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Robert Hancock      Saskatoon, SK, Canada
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