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    DateMon, 14 Jan 2008 01:04:19 -0500
    From"Lee Revell" <>
    SubjectRe: Is it possible to change IRQ for certain device?
    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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