Messages in this thread | | | Date | Mon, 14 Jan 2008 01:04:19 -0500 | From | "Lee Revell" <> | Subject | Re: Is it possible to change IRQ for certain device? |
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On Jan 14, 2008 12:30 AM, Bryan Donlan <bdonlan@gmail.com> wrote: > > On Jan 13, 2008 10:57 PM, Lee Revell <rlrevell@joe-job.com> wrote: > > On Jan 11, 2008 11:57 AM, Jan Marek <linux@hazard.jcu.cz> wrote: > > Why is a shared IRQ a problem for you? IRQ handlers are supposed to > > be fast enough that disabling an IRQ line for the duration of the > > handler execution should not be a problem even if the IRQ is shared. > > VGA interrupts in particular should only fire once per frame and only > > need to flip some bits to wake up any processes waiting on vsync. > > > > If you have issues with a shared VGA interrupt then the bug is that > > some IRQ handler runs for too long and should be deferring work to a > > bottom half. > > Jan is apparently using the nvidia binary driver, so I doubt it will > be possible to fix the bug that prevents it from sharing IRQs. >
Ah, of course, stupid me. Thought I was on linux-audio-user where this is a FAQ (for completely different reasons) and not LKML.
But this is strange - I'm sure I've seen people using that driver with a shared IRQ before.
Jan, maybe you can blacklist ohci-hcd as a workaround? In any case let's take this discussion off LKML so as not to spam the list with binary only driver issues.
Lee
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