Messages in this thread | | | Date | Mon, 22 Apr 2013 11:18:47 +0200 | From | Borislav Petkov <> | Subject | Re: irq 16: nobody cared |
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On Mon, Apr 22, 2013 at 10:01:36AM +0200, Ingo Molnar wrote: > Hm, this really smells like a workaround: treating the symptom, not > the cause.
Well, I just tested Takashi's add missing synchronize_irq() to the suspend path of snd_hda_intel and it doesn't help.
So it could be an issue with this driver or only this hw/driver can exacerbate RCU this much to trigger the spurious irq machinery.
> How can an increase in grace-periods break drivers and suspend? Do we > understand exactly what happens there?
I'd rather look into Paul's direction here. :)
> If we do, can we fix that instead of tweaking the RCU timeouts?
Well, I was under the impression yesterday that we actually want to switch to expedited grace periods for suspend/resume *anyway*, regardless of drivers.
Paul?
-- Regards/Gruss, Boris.
Sent from a fat crate under my desk. Formatting is fine. --
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