Re: [PATCH][2.6][5/5]Support for HPET based timer

From: Jamie Lokier
Date: Tue Aug 19 2003 - 19:21:03 EST


Vojtech Pavlik wrote:
> On Tue, Aug 19, 2003 at 12:20:22PM -0700, Pallipadi, Venkatesh wrote:
>
> > 5/5 - hpet5.patch - This can be a standalone patch. Without this
> > patch we loose interrupt generation capability
> > of RTC (/dev/rtc), due to HPET. With this patch
> > we basically try to emulate RTC interrupt
> > functions in software using HPET counter 1.
> >
>
> This is very wrong IMO. We shouldn't try to emulate the RTC interrupt
> for the kernel, instead the HPET should use native APIC interrupt
> routing.

Even on those machines where APIC interrupts are not usable?
(E.g. due to interactions with the SMM BIOS).

-- Jamie
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