Messages in this thread Patch in this message |  | | | Date | Fri, 25 Nov 2005 03:00:05 +0900 | | From | Akira Tsukamoto <> | | Subject | [PATCH 2.4] fix for clock running too fast |
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Ingo Molnar <mingo@elte.hu> mentioned: > > * Akira Tsukamoto <akira-t@s9.dion.ne.jp> 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 <mingo@elte.hu> > > Ingo
This patch is against kernel 2.4.
Signed-off-by: Akira Tsukamoto <akira-t@s9.dion.ne.jp>
--- linux-2.4.32-atifix/arch/i386/kernel/io_apic.c.orig 2004-11-17 20:54:21.000000000 +0900 +++ linux-2.4.32-atifix/arch/i386/kernel/io_apic.c 2005-11-25 02:27:32.000000000 +0900 @@ -1194,7 +1194,7 @@ 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;
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-- Akira Tsukamoto <akira-t@s9.dion.ne.jp> <>
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