On Sat, 14 Jul 2007 01:22:10 -0600 Robert Hancock <[email protected]> wrote:
> Andrew Morton wrote:
> > +x86_64-dynticks-disable-hpet_id_legsup-hpets.patch
> >
> > pretend to fix it
>
> I'm not sure what this patch does on x86_64, but it seems like it
> trashes all HPET support on i386?
>
It might do, if your i386 is old and has the HPET_ID_LEGSUP bit set.
The code path which that patch disables:
--- a/arch/i386/kernel/hpet.c~x86_64-dynticks-disable-hpet_id_legsup-hpets
+++ a/arch/i386/kernel/hpet.c
@@ -376,7 +376,7 @@ int __init hpet_enable(void)
clocksource_register(&clocksource_hpet);
- if (id & HPET_ID_LEGSUP) {
+ if (0 && (id & HPET_ID_LEGSUP)) {
hpet_enable_int();
hpet_reserve_platform_timers(id);
/*
_
will, if executed (on x86_64, at least), instaoops the machine. It might
take down i386 as well, dunno.
I'd forgotten about this problem, and it seems that Thomas & John have too.
It's a showstopper.
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