Ingo Molnar <[email protected]> mentioned:
>
> * Akira Tsukamoto <[email protected]> wrote:
>
> > This one line patch adds upper bound testing inside timer_irq_works()
> > when evaluating whether irq timer works or not on boot up.
> >
> > It fix the machines having problem with clock running too fast.
> >
> > What this patch do is, if timer interrupts running too fast through
> > IO-APIC IRQ then false back to i8259A IRQ.
>
> thanks - looks good to me.
>
> Acked-by: Ingo Molnar <[email protected]>
>
> Ingo
Thanks,
I regenerated my patch to the latest kernel.
Signed-off-by: Akira Tsukamoto <[email protected]>
--- linux-2.6.15-rc2-atiix/arch/i386/kernel/io_apic.c.orig 2005-11-20 12:25:03.000000000 +0900
+++ linux-2.6.15-rc2-atiix/arch/i386/kernel/io_apic.c 2005-11-25 02:43:40.000000000 +0900
@@ -1877,7 +1877,7 @@ static int __init timer_irq_works(void)
* might have cached one ExtINT interrupt. Finally, at
* least one tick may be lost due to delays.
*/
- if (jiffies - t1 > 4)
+ if (jiffies - t1 > 4 && jiffies - t1 < 16)
return 1;
return 0;
--
Akira Tsukamoto <[email protected]> <>
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