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SubjectRe: [patch 19/31] clockevents: i386 drivers
On Wed, 13 Dec 2006 14:02:11 +0100 Ingo Molnar <mingo@elte.hu> wrote:

> Add clockevent drivers for i386: lapic (local) and PIT (global). Update
> the timer IRQ to call into the PIT driver's event handler and the
> lapic-timer IRQ to call into the lapic clockevent driver. The
> assignement of timer functionality is delegated to the core framework
> code and replaces the compile and runtime evalution in
> do_timer_interrupt_hook()
>
> Use the clockevents broadcast support and implement the lapic_broadcast
> function for ACPI.
>
> No changes to existing functionality.

This patch breaks the NMI on my crufty old dual-PIII supermicro p6dbe
machine:


Testing NMI watchdog ... CPU#0: NMI appears to be stuck (26->26)!
CPU#1: NMI appears to be stuck (0->0)!


vmm:/home/akpm> cat /proc/interrupts
CPU0 CPU1
0: 59 0 IO-APIC-edge timer
1: 2 0 IO-APIC-edge i8042
2: 0 0 XT-PIC-XT cascade
6: 3 0 IO-APIC-edge floppy
8: 1 0 IO-APIC-edge rtc
10: 192 61 IO-APIC-fasteoi aic7xxx
11: 1339 31 IO-APIC-fasteoi eth0
12: 3 1 IO-APIC-edge i8042
15: 3067 7 IO-APIC-edge ide1
NMI: 26 0
LOC: 58665 58663
ERR: 0
MIS: 0

and it isn't changing.

See http://userweb.kernel.org/~akpm/nmi-prob/
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