Messages in this thread | | | Subject | Re: better leve triggered IRQ management needed | From | Arjan van de Ven <> | Date | Mon, 24 Apr 2006 22:43:36 +0200 |
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On Mon, 2006-04-24 at 16:16 -0400, Alan Cox wrote: > On Mon, Apr 24, 2006 at 09:53:22PM +0200, Arjan van de Ven wrote: > > we now have that neat polling thing Alan did for interrupts (but which > > is optional). To limp along better the kernel could auto-enable that for > > any such shared interrupt automatically as a "safe fallback"... > > (or heck, if things are this broken, you probably want it for all > > interrupts at that point just to be sure) > > That is really something drivers should handle themselves if they are doing > shared edge trigger.
but the issue is .. drivers don't know. They didn't *want* edge trigger in the first place generally
> For one the kernel core has no idea the right polling > time
well... the corner case (as rmk described) is full starvation; even polling once per second is better than not polling at tall there.,..
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